4th Mar 2002 [SBWID-5161]
COMMAND
cfsd buffer overflow
SYSTEMS AFFECTED
cfsd versions 1.3.3-8 and others
PROBLEM
In Debian advisory [DSA 116-1] [http://www.debian.org/security/] :
Zorgon found several buffer overflows in cfsd, a daemon that pushes
encryption services into the Unix(tm) file system.
No more details where provided yet, see diff below.
SOLUTION
Diff is 1.3.3-8.1, for other versions check your vendor :
--- cfs-1.3.3.orig/debian/README.debian
+++ cfs-1.3.3/debian/README.debian
@@ -0,0 +1,64 @@
+cfs for DEBIAN
+----------------------
+
+This is the Debian GNU/Linux prepackaged version of cfs, the UNIX
+Cryptographic File System.
+
+
+
+<Extract from notes.ms>
+
+CFS pushes encryption services into the Unix(tm) file system.
+It supports secure storage at the system level through a standard
+Unix file system interface to encrypted files. Users associate a
+cryptographic key with the directories they wish to protect.
+Files in these directories (as well as their pathname components)
+are transparently encrypted and decrypted with the specified key
+without further user intervention; cleartext is never stored on a
+disk or sent to a remote file server. CFS employs a novel combi-
+nation of DES stream and codebook cipher modes to provide high
+security with good performance on a modern workstation. CFS can
+use any available file system for its underlying storage without
+modification, including remote file servers such as NFS. System
+management functions, such as file backup, work in a normal man-
+ner and without knowledge of the key.
+
+<SNIP>
+
+CFS runs entirely at user level, as a local NFS server running on
+the clients machine\'s \"loopback\" interface. The system consists
+of cfsd (the CFS server daemon), and a small suite of tools
+(cmkdir, cattach, cdetach and ssh<--DEBIAN--removed> that create
+encrypted directories and manage keys as they are used. CFS, and
+the motivation and principles behind it, is described in detail
+in: Matt Blaze, \"A Cryptographic File System for Unix.\" Proc. 1st
+ACM Conference on Computer and Communication Security, Fairfax,
+VA, November 1993.
+
+<SNIP>
+
+Basically, CFS provides a mechanism to associate \"real\" director-
+ies (on other file systems) that contain encrypted data with tem-
+porary \"virtual\" names through which which users can read and
+write cleartext. These virtual names appear under the CFS mount
+point, which is usually called /crypt (this document assumes that
+convention).
+
+Users create encrypted directories on regular file systems (e.g.
+in their home directories) using the cmkdir command, which crea-
+tes the directory and assigns to it a cryptographic \"passphrase\"
+which will be used to encrypt its contents. To actually use an
+encrypted directory, it must be \"attached\" to CFS using the com-
+mand cattach, which asks for the passphrase and installs an ass-
+ociation between the \"real\" directory and a temporary name under
+/crypt. Cleartext is read and written under the virtual direct-
+ory in /crypt, but the files are stored in encrypted form (with
+encrypted names) in the real directory. When the directory is not
+in use, the association is removed with the cdetatch command,
+which deletes the cleartext virtual directory under /crypt (but
+not the ciphertext files, or course).
+
+</Extract from notes.ms>
+
+
+Chris Leishman <masklin@debian.org>, Fri, 30 Oct 1998 23:21:12 +1100
--- cfs-1.3.3.orig/debian/cfsconfig
+++ cfs-1.3.3/debian/cfsconfig
@@ -0,0 +1,90 @@
+#!/bin/sh
+
+CFSFS=/.cfsfs
+CRYPT=/crypt
+
+echo -n \"Configure cfs now [Y/n]? \"
+read input
+if expr \"$input\" : \'[Nn]\' > /dev/null
+then
+ exit 0;
+fi
+
+echo -n \"Use default Cryptographic Filesystem Configuration [Y/n]? \"
+read input
+if expr \"$input\" : \'[Nn]\' > /dev/null
+then
+ if ! grep -q \'^CFSFS=$\' /etc/init.d/cfsd
+ then
+ CRYPT=`grep \'^CRYPT=\' /etc/init.d/cfsd | sed -e \"s/^CRYPT=\\(.*\\)$/\\1/\"`
+ CFSFS=`grep \'^CFSFS=\' /etc/init.d/cfsd | sed -e \"s/^CFSFS=\\(.*\\)$/\\1/\"`
+ fi
+ echo -n \"Enter server mount point [$CFSFS] \"
+ read input
+ if [ ! -z $input ]
+ then
+ CFSFS=$input
+ fi
+ echo -n \"Enter client mount point [$CRYPT] \"
+ read input
+ if [ ! -z $input ]
+ then
+ CRYPT=$input
+ fi
+fi
+
+OLDCRYPT=\"\"
+OLDCFSFS=\"\"
+if ! grep -q \'^CFSFS=$\' /etc/init.d/cfsd
+then
+ OLDCRYPT=`grep \'^CRYPT=\' /etc/init.d/cfsd | sed -e \"s/^CRYPT=\\(.*\\)$/\\1/\"`
+ OLDCFSFS=`grep \'^CFSFS=\' /etc/init.d/cfsd | sed -e \"s/^CFSFS=\\(.*\\)$/\\1/\"`
+fi
+
+/etc/init.d/cfsd stop
+
+mv /etc/init.d/cfsd /etc/init.d/cfsd_tmp$$
+sed -e \"s!^CFSFS=.*\\$!CFSFS=$CFSFS!;s!^CRYPT=.*\\$!CRYPT=$CRYPT!\" /etc/init.d/cfsd_tmp$$ > /etc/init.d/cfsd
+rm /etc/init.d/cfsd_tmp$$
+chmod 755 /etc/init.d/cfsd
+
+if [ \"$OLDCRYPT\" != \"$CRYPT\" -o \"$OLDCFSFS\" != \"$CFSFS\" ]
+then
+ echo
+ echo \"Old directories $OLDCRYPT and $OLDCFSFS not automatically removed.\"
+ echo \"Please remove by hand.\"
+ echo
+fi
+
+if [ ! -e $CFSFS ]
+then
+ echo \"Creating directory $CFSFS\"
+ mkdir -p -m 0 $CFSFS
+fi
+if [ ! -e $CRYPT ]
+then
+ echo \"Creating directory $CRYPT\"
+ mkdir -p -m 755 $CRYPT
+fi
+
+if grep -q \"Cryptographic Filesystem export\" /etc/exports
+then
+ mv /etc/exports /etc/exports_tmp$$
+ sed -e \"/^# Automatically added for use by cfs\\$/ d;/^.*localhost(rw).*#.*Cryptographic Filesystem export.*\\$/ d;\" /etc/exports_tmp$$ > /etc/exports
+ chmod 644 /etc/exports
+ rm /etc/exports_tmp$$
+fi
+
+echo \"# Automatically added for use by cfs\" >> /etc/exports
+echo \"$CFSFS localhost(rw) # Cryptographic Filesystem export\" >> /etc/exports
+
+if [ -x /etc/init.d/nfs-server ]; then
+ echo \"Restarting nfs-server\"
+ /etc/init.d/nfs-server restart > /dev/null
+fi
+if [ -x /etc/init.d/nfs-kernel-server ]; then
+ echo \"Restarting nfs-kernel-server\"
+ /etc/init.d/nfs-kernel-server restart > /dev/null
+fi
+
+/etc/init.d/cfsd start
--- cfs-1.3.3.orig/debian/changelog
+++ cfs-1.3.3/debian/changelog
@@ -0,0 +1,57 @@
+cfs (1.3.3-8.1) stable; urgency=high
+
+ * bug: buffer overflows in cfsd server daemon code: cvs_adm.c, cvs_fh.c
+ (thx Zorgon for pointing at this).
+ Some careless strcpy()\'s in the server code caused cfsd to die with
+ segfault when attaching crypto directories with long pathnames and
+ on filehandle operations in attached crypto directories with long
+ pathnames, see bug #135903 for details (closes: #135903).
+
+ -- Gerrit Pape <pape@smarden.org> Mon, 25 Feb 2002 15:48:59 +0100
+
+cfs (1.3.3-8) frozen unstable; urgency=low
+
+ * Fixed typo in dependancies
+ * Made CFS silent on startup
+
+ -- Chris Leishman <masklin@debian.org> Mon, 15 May 2000 09:29:34 +1000
+
+cfs (1.3.3-7) frozen unstable; urgency=low
+
+ * Fixed bug in rules which was causing cfsconfig to lose permissions.
+
+ -- Chris Leishman <masklin@debian.org> Mon, 1 May 2000 13:29:34 +1000
+
+cfs (1.3.3-6) frozen unstable; urgency=low
+
+ * Changes to refect name change of knfs server to nfs-kernel-server
+
+ -- Chris Leishman <masklin@debian.org> Sun, 30 Apr 2000 16:16:54 +1000
+
+cfs (1.3.3-5) unstable; urgency=low
+
+ * Fixed some errors in prerm script
+
+ -- Chris Leishman <masklin@debian.org> Sun, 22 Aug 1998 23:01:19 +1000
+
+cfs (1.3.3-4) unstable; urgency=low
+
+ * Reassigned dependancies to nfs-server | knfs
+
+ * Added support for restarting /etc/init.d/knfs-server if available
+
+ -- Chris Leishman <masklin@debian.org> Mon, 16 Aug 1998 10:56:23 +1000
+
+cfs (1.3.3-3) unstable; urgency=low
+
+ * Initial Release.
+
+ * Repackaged by Chris Leishman. Removed installation of esm. Ported
+ to libc6. Fixed bugs and rewrote debian/ scripts.
+
+ -- Chris Leishman <masklin@debian.org> Fri, 30 Oct 1998 23:21:12 +1100
+
+Local variables:
+mode: debian-changelog
+add-log-mailing-address: \"masklin@debian.org\"
+End:
--- cfs-1.3.3.orig/debian/conffiles
+++ cfs-1.3.3/debian/conffiles
@@ -0,0 +1 @@
+/etc/init.d/cfsd
--- cfs-1.3.3.orig/debian/control
+++ cfs-1.3.3/debian/control
@@ -0,0 +1,24 @@
+Source: cfs
+Section: non-us/otherosfs
+Priority: optional
+Maintainer: Chris Leishman <masklin@debian.org>
+Standards-Version: 2.4.0.0
+
+Package: cfs
+Architecture: any
+Depends: ${shlibs:Depends}
+Depends: nfs-server | nfs-kernel-server
+Description: Cryptographic Filesystem
+ CFS pushes encryption services into the Unix(tm) file system. It
+ supports secure storage at the system level through a standard
+ Unix file system interface to encrypted files. Users associate a
+ cryptographic key with the directories they wish to protect.
+ Files in these directories (as well as their pathname components)
+ are transparently encrypted and decrypted with the specified key
+ without further user intervention.
+ .
+ CFS emplys a novel combination of DES stream and codebook cipher
+ modes to provide high security with good performance on a modern
+ workstation. CFS can use any available file system for its unde-
+ rlying storage without modification, i ncluding remote file ser-
+ vers such as NFS.
--- cfs-1.3.3.orig/debian/copyright
+++ cfs-1.3.3/debian/copyright
@@ -0,0 +1,27 @@
+This package was debianized by Chris Leishman masklin@debian.org on
+Fri, 30 Oct 1998 22:52:10 +1100.
+
+Original download site is unknown.
+
+Upstream Author(s): Matt Blaze AT&T
+
+Copyright:
+
+This is version 1.3.1 of CFS
+
+ * The author of this software is Matt Blaze.
+ * Copyright (c) 1992, 1993, 1994, 1995 by AT&T.
+ * Permission to use, copy, and modify this software without fee
+ * is hereby granted, provided that this entire notice is included in
+ * all copies of any software which is or includes a copy or
+ * modification of this software and in all copies of the supporting
+ * documentation for such software.
+ *
+ * This software is subject to United States export controls.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED \"AS IS\", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR AT&T MAKE ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+
+
--- cfs-1.3.3.orig/debian/dirs
+++ cfs-1.3.3/debian/dirs
@@ -0,0 +1,2 @@
+usr/bin
+usr/sbin
--- cfs-1.3.3.orig/debian/docs
+++ cfs-1.3.3/debian/docs
@@ -0,0 +1 @@
+README README.esm README.history README.install README.irix README.linux notes.ms
--- cfs-1.3.3.orig/debian/init.d
+++ cfs-1.3.3/debian/init.d
@@ -0,0 +1,43 @@
+#! /bin/sh
+#
+# This file was automatically customized by debmake on Fri, 30 Oct 1998 22:52:10 +1100
+#
+# Written by Miquel van Smoorenburg <miquels@drinkel.ow.org>.
+# Modified for Debian GNU/Linux by Ian Murdock <imurdock@gnu.ai.mit.edu>.
+# Modified for Debian by Christoph Lameter <clameter@debian.org>
+
+PATH=/bin:/usr/bin:/sbin:/usr/sbin
+DAEMON=/usr/sbin/cfsd
+CRYPT=
+CFSFS=
+# The following value is extracted by debstd to figure out how to generate
+# the postinst script. Edit the field to change the way the script is
+# registered through update-rc.d (see the manpage for update-rc.d!)
+FLAGS=\"defaults 50\"
+
+test -f $DAEMON || exit 0
+test \"$CRYPT\" != \"\" || exit 0
+test \"$CFSFS\" != \"\" || exit 0
+
+case \"$1\" in
+ start)
+ start-stop-daemon --start --verbose --exec $DAEMON
+ mount -o port=3049,intr localhost:$CFSFS $CRYPT
+ ;;
+ stop)
+ start-stop-daemon --stop --verbose --exec $DAEMON
+ umount $CRYPT > /dev/null
+ ;;
+ restart|force-reload)
+ start-stop-daemon --stop --verbose --exec $DAEMON
+ umount $CRYPT > /dev/null
+ start-stop-daemon --start --verbose --exec $DAEMON
+ mount -o port=3049,intr localhost:$CFSFS $CRYPT
+ ;;
+ *)
+ echo \"Usage: /etc/init.d/cfs {start|stop|restart}\"
+ exit 1
+ ;;
+esac
+
+exit 0
--- cfs-1.3.3.orig/debian/postinst
+++ cfs-1.3.3/debian/postinst
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+#DEBHELPER#
+
+/usr/sbin/cfsconfig
+
+echo
+echo \'Use \"cfsconfig\" to (re)configure at a future date.\'
+echo
--- cfs-1.3.3.orig/debian/prerm
+++ cfs-1.3.3/debian/prerm
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+#DEBHELPER#
+
+CRYPT=`grep \'^CRYPT=\' /etc/init.d/cfsd | sed -e \"s/^CRYPT=\\(.*\\)$/\\1/\"`
+CFSFS=`grep \'^CFSFS=\' /etc/init.d/cfsd | sed -e \"s/^CFSFS=\\(.*\\)$/\\1/\"`
+
+if [ ! -z $CFSFS ]; then
+ rmdir $CFSFS
+fi
+if [ ! -z $CRYPT ]; then
+ rmdir $CRYPT
+fi
+
+mv /etc/init.d/cfsd /etc/init.d/cfsd_tmp$$
+sed -e \"s!^CFSFS=.*\\$!CFSFS=!;s!^CRYPT=.*\\$!CRYPT=!\" /etc/init.d/cfsd_tmp$$ > /etc/init.d/cfsd
+rm /etc/init.d/cfsd_tmp$$
+chmod 755 /etc/init.d/cfsd
+
+mv /etc/exports /etc/exports_tmp$$
+sed -e \"/^# Automatically added for use by cfs\\$/ d;/^.*localhost(rw).*#.*Cryptographic.*\\$/ d;\" /etc/exports_tmp$$ > /etc/exports
+chmod 644 /etc/exports
+rm /etc/exports_tmp$$
+
+if [ -x /etc/init.d/nfs-server ]; then
+ /etc/init.d/nfs-server restart > /dev/null
+fi
+if [ -x /etc/init.d/nfs-kernel-server ]; then
+ /etc/init.d/nfs-kernel-server restart > /dev/null
+fi
+
+exit 0;
--- cfs-1.3.3.orig/debian/rules
+++ cfs-1.3.3/debian/rules
@@ -0,0 +1,76 @@
+#!/usr/bin/make -f
+# MAde with the aid of dh_make, by Craig Small
+# Sample debian/rules that uses debhelper. GNU copyright 1997 by Joey Hess.
+# Some lines taken from debmake, by Cristoph Lameter.
+
+# Uncomment this to turn on verbose mode.
+#export DH_VERBOSE=1
+
+build: build-stamp
+build-stamp:
+ dh_testdir
+
+
+ # Add here commands to compile the package.
+ $(MAKE) cfs
+
+ touch build-stamp
+
+clean:
+ dh_testdir
+ dh_testroot
+ rm -f build-stamp install-stamp
+
+ # Add here commands to clean up after the build process.
+ -$(MAKE) clean
+
+ dh_clean
+
+install: install-stamp
+install-stamp: build-stamp
+ dh_testdir
+ dh_testroot
+ dh_clean -k
+ dh_installdirs
+
+ # Add here commands to install the package into debian/tmp.
+ $(MAKE) install_cfs BINDIR=`pwd`/debian/tmp/usr/bin ETCDIR=`pwd`/debian/tmp/usr/sbin
+ install -m755 debian/cfsconfig debian/tmp/usr/sbin
+
+ touch install-stamp
+
+# Build architecture-independent files here.
+binary-indep: build install
+# We have nothing to do by default.
+
+# Build architecture-dependent files here.
+binary-arch: build install
+# dh_testversion
+ dh_testdir
+ dh_testroot
+ dh_installdocs
+ dh_installexamples
+ dh_installmenu
+# dh_installemacsen
+ dh_installinit --init-script=cfsd --update-rcd-params=\"defaults 30 20\"
+ dh_installcron
+ dh_installmanpages ssh.1 esm.1
+ cd debian/tmp/usr/share/man/man1 && ln -s ../man7/undocumented.7.gz cfsconfig.1.gz
+# dh_undocumented
+ dh_installchangelogs
+ dh_strip
+ dh_compress
+ dh_fixperms
+ dh_suidregister
+ dh_installdeb
+ dh_shlibdeps
+ dh_gencontrol
+# dh_makeshlibs
+ dh_md5sums
+ dh_builddeb
+
+source diff:
+ @echo >&2 \'source and diff are obsolete - use dpkg-source -b\'; false
+
+binary: binary-indep binary-arch
+.PHONY: build clean binary-indep binary-arch binary
--- cfs-1.3.3.orig/Makefile
+++ cfs-1.3.3/Makefile
@@ -108,10 +108,10 @@
## use these for recent versions of Linux with rpcgen-from-hell
# See NOTE TO LINUX USERS above, and also README.linux,
# if you can\'t make things work.
-CFLAGS=$(COPT) -U__OPTIMIZE__ -traditional -Dd_fileno=d_ino -I$(RINCLUDES)
+CFLAGS=$(COPT) -U__OPTIMIZE__ -Dd_fileno=d_ino
LIBS=
COMPAT=
-RPCOPTS= -k -b
+RPCOPTS=
## use these for older versions Linux (Slackware 1.1.2)
# See NOTE TO LINUX USERS above, and also README.linux,
@@ -209,7 +209,7 @@
SRCS=Makefile admproto.x mount.x nfsproto.x cfs.c cfs_adm.c cfs_nfs.c cfs.h \\
cfs_fh.c cfs_des.c cfs_cipher.c mcg.c mcgsbox.c mcg.h shs.c shs.h cattach.c \\
- getpass.c cdetach.c cmkdir.c adm.c cname.c ccat.c cpasswd.c truerand.c \\
+ getpass.c cdetach.c cmkdir.c adm.c cname.c ccat.c cpasswd.c \\
safer.c safer.h ver.c i o ssh make_with_bad_rpcgen
ESRCS=esm.c esm_cipher.c esm_gen.c dhparams.c esm.h
MANS=cattach.1 cdetach.1 cmkdir.1 ssh.1 cfsd.8 cname.8 ccat.8 cpasswd.1 \\
@@ -218,10 +218,10 @@
OBJS= cfs.o nfsproto_xdr.o nfsproto_svr.o admproto_xdr.o admproto_svr.o \\
cfs_adm.o cfs_nfs.o cfs_fh.o cfs_des.o cfs_cipher.o adm.o ver.o mcgsbox.o \\
mcg.o safer.o
-EOBJS=dhparams.o truerand.o esm_gen.o esm.o esm_cipher.o
+EOBJS=dhparams.o esm_gen.o esm.o esm_cipher.o
COBJS=admproto_clnt.o cfs_des.o cfs_cipher.o cattach.o getpass.o cmkdir.o \\
cdetach.o ver.o cname.o ccat.o mcgsbox.o mcgsbox.o mcg.o shs.o cpasswd.o \\
- truerand.o safer.o
+ safer.o
OTHERS = nfsproto.h nfsproto_svr.c nfsproto_xdr.c admproto.h admproto_svr.c \\
admproto_xdr.c admproto_clnt.c
@@ -245,14 +245,14 @@
ver.o $(LIBS) -o cdetach
cmkdir: getpass.o adm.o cfs_des.o cfs_cipher.o cmkdir.o ver.o mcg.o \\
- mcgsbox.o safer.o shs.o truerand.o
+ mcgsbox.o safer.o shs.o
$(CC) cmkdir.o cfs_des.o cfs_cipher.o getpass.o adm.o ver.o mcg.o \\
- mcgsbox.o safer.o shs.o truerand.o $(COMPAT) -o cmkdir
+ mcgsbox.o safer.o shs.o $(COMPAT) -o cmkdir
cpasswd: getpass.o cfs_des.o cfs_cipher.o cpasswd.o ver.o mcg.o \\
- mcgsbox.o safer.o shs.o truerand.o
+ mcgsbox.o safer.o shs.o
$(CC) cpasswd.o cfs_des.o cfs_cipher.o getpass.o ver.o mcg.o \\
- mcgsbox.o safer.o shs.o truerand.o $(COMPAT) -o cpasswd
+ mcgsbox.o safer.o shs.o $(COMPAT) -o cpasswd
cname: cname.o getpass.o cfs_des.o cfs_cipher.o cfs_adm.o cfs_fh.o \\
cfs_nfs.o ver.o mcg.o mcgsbox.o safer.o shs.o
@@ -270,10 +270,6 @@
$(COBJS): nfsproto.h admproto.h cfs.h mcg.h safer.h shs.h
-# truerand is a special case, no -O
-truerand.o:
- $(CC) -c truerand.c
-
nfsproto_xdr.c: nfsproto.x
rpcgen $(RPCOPTS) -c -o nfsproto_xdr.c nfsproto.x
@@ -297,7 +293,7 @@
clean:
rm -f $(OBJS) $(COBJS) $(OTHERS)
- rm -f cfsd cmkdir cattach cpassed cdetach cname ccat
+ rm -f cfsd cmkdir cattach cpasswd cdetach cname ccat
rm -f $(EOBJS) esm
cfs.shar: $(SRCS) $(ESRCS) $(MANS)
@@ -307,25 +303,27 @@
$(PRINTCMD) $(SRCS) cfs.h mcg.h safer.h admproto.h nfsproto.h
install_cfs: cfsd cattach cdetach cmkdir
+ install -d -o root $(ETCDIR)
+ install -d -o root $(BINDIR)
install -m 0755 -c -o root cfsd $(ETCDIR)
- install -m 0755 -c -o root cattach cdetach cmkdir cpasswd ssh \\
+ install -m 0755 -c -o root cattach cdetach cmkdir cpasswd \\
cname ccat $(BINDIR)
# install -m 0755 i o $(BINDIR)
- @echo \"Kill any running cfsd prior to restarting.\"
- @echo \"See the README file for more information.\"
- @echo \"Don\'t forget to install the man pages (*.[18]).\"
+# @echo \"Kill any running cfsd prior to restarting.\"
+# @echo \"See the README file for more information.\"
+# @echo \"Don\'t forget to install the man pages (*.[18]).\"
$(EOBJS): esm.h
-esm: esm.o cfs_des.o esm_cipher.o dhparams.o truerand.o shs.o
- $(CC) -o esm esm.o cfs_des.o esm_cipher.o dhparams.o truerand.o shs.o $(RSALIB)
+esm: esm.o cfs_des.o esm_cipher.o dhparams.o shs.o
+ $(CC) -o esm esm.o cfs_des.o esm_cipher.o dhparams.o shs.o $(RSALIB)
# to generate your own dhparams, remove the existing dhparams.c and
# remake esm. You shouldn\'t do this if you want to remain interoperable.
# esm_gen takes a long time.
-esm_gen: esm_gen.o esm_cipher.o cfs_des.o truerand.o
- $(CC) -o esm_gen esm_gen.o esm_cipher.o cfs_des.o truerand.o $(RSALIB)
+esm_gen: esm_gen.o esm_cipher.o cfs_des.o
+ $(CC) -o esm_gen esm_gen.o esm_cipher.o cfs_des.o $(RSALIB)
dhparams.c:
make esm_gen
@@ -336,4 +334,4 @@
esm.shar:
shar README.esm Makefile esm.c *.x cfs_des.c esm_cipher.c esm_gen.c \\
- dhparams.c truerand.c shs.c esm.h esm.1> esm.shar
+ dhparams.c shs.c esm.h esm.1> esm.shar
--- cfs-1.3.3.orig/cfs.c
+++ cfs-1.3.3/cfs.c
@@ -202,7 +202,7 @@
perror(\"cfsd: fork\\n\");
exit(1);
}
- printf(\"cfs ready [%d]\\n\",pid);
+/* printf(\"cfs ready [%d]\\n\",pid); */
exit(0);
}
#else
--- cfs-1.3.3.orig/cfs_adm.c
+++ cfs-1.3.3/cfs_adm.c
@@ -36,14 +36,12 @@
}
void *
-admproc_null_2()
+admproc_null_2_svc(void *a, struct svc_req *r)
{
}
cfsstat *
-admproc_attach_2(ap,rp)
- cfs_attachargs *ap;
- SR *rp;
+admproc_attach_2_svc(cfs_attachargs *ap, struct svc_req *rp)
{
static cfsstat ret;
int i;
@@ -154,9 +152,7 @@
}
cfsstat *
-admproc_detach_2(ap,rp)
- cfs_detachargs *ap;
- SR *rp;
+admproc_detach_2_svc(cfs_detachargs *ap, struct svc_req *rp)
{
static cfsstat ret;
int i;
@@ -217,8 +213,11 @@
FILE *fp;
char fn[1024];
char buf[9];
+ int l;
- sprintf(fn,\"%s/...\",path);
+ l =snprintf(fn, NFS_MAXPATHLEN, \"%s/...\",path);
+ if (l < 0 || l >= NFS_MAXPATHLEN)
+ return CFSERR_BADNAME;
if ((fp=fopen(fn,\"r\"))==NULL)
return CFSERR_NODIR;
if (fread(buf,8,1,fp)!=1) {
--- cfs-1.3.3.orig/cfs_fh.c
+++ cfs-1.3.3/cfs_fh.c
@@ -835,6 +835,7 @@
char linkname[NFS_MAXPATHLEN+1];
char vect[NFS_MAXPATHLEN+1];
struct stat sb;
+ int l;
if (p==NULL) {
cfserrno=NFSERR_STALE;
@@ -848,12 +849,20 @@
}
if ((p->parent==0) && (!strcmp(comp,\"..\")))
return fhrootlook(p->ins->name,h);
- sprintf(path,\"%s/%s\",p->name,comp);
+ l =snprintf(path, NFS_MAXPATHLEN, \"%s/%s\",p->name,comp);
+ if (l < 0 || l >= NFS_MAXPATHLEN) {
+ cfserrno =NFSERR_NAMETOOLONG;
+ return -2;
+ }
if (lstat(path,&sb)<0) {
return -1; /* just need the inode */
}
/* check for a linkfile */
- sprintf(linkname,\"%s/.pvect_%s\",p->name,comp);
+ l =snprintf(linkname, NFS_MAXPATHLEN, \"%s/.pvect_%s\",p->name,comp);
+ if (l < 0 || l >= NFS_MAXPATHLEN) {
+ cfserrno =NFSERR_NAMETOOLONG;
+ return -2;
+ }
if (readlink(linkname,vect,9) != 8) {
bcopy((char *)zerovect,(char *)vect,8);
strcpy(linkname,\"/NOWHERE/null\");
--- cfs-1.3.3.orig/cfs_nfs.c
+++ cfs-1.3.3/cfs_nfs.c
@@ -58,9 +58,7 @@
}
void *
-nfsproc_null_2(ap,rp)
- void *ap;
- SR rp;
+nfsproc_null_2_svc(void *ap, struct svc_req *rp)
{
static int ret=0;
return ((void*) &ret);
@@ -72,9 +70,7 @@
readdirres *rootreaddir();
attrstat *
-nfsproc_getattr_2(ap,rp)
- nfs_fh *ap;
- SR rp;
+nfsproc_getattr_2_svc(nfs_fh *ap, struct svc_req *rp)
{
static attrstat ret;
int uid;
@@ -118,9 +114,7 @@
}
attrstat *
-nfsproc_setattr_2(ap,rp)
- sattrargs *ap;
- SR rp;
+nfsproc_setattr_2_svc(sattrargs *ap, struct svc_req *rp)
{
static attrstat ret;
int uid;
@@ -168,9 +162,7 @@
}
void *
-nfsproc_root_2(ap,rp)
- void *ap;
- SR rp;
+nfsproc_root_2_svc(void *ap, struct svc_req *rp)
{
static int ret=0;
@@ -179,9 +171,7 @@
/* fix this to deal w/ fs root (instance root should be ok) */
diropres *
-nfsproc_lookup_2(ap,rp)
- diropargs *ap;
- SR rp;
+nfsproc_lookup_2_svc(diropargs *ap, struct svc_req *rp)
{
static diropres ret;
diropres *retp;
@@ -258,9 +248,7 @@
}
readlinkres *
-nfsproc_readlink_2(ap,rp)
- nfs_fh *ap;
- SR rp;
+nfsproc_readlink_2_svc(nfs_fh *ap, struct svc_req *rp)
{
static readlinkres ret;
int uid;
@@ -309,9 +297,7 @@
readres *
-nfsproc_read_2(ap,rp)
- readargs *ap;
- SR rp;
+nfsproc_read_2_svc(readargs *ap, struct svc_req *rp)
{
static readres ret;
static char buffer[8192];
@@ -370,9 +356,7 @@
void *
-nfsproc_writecache_2(ap,rp)
- void *ap;
- SR rp;
+nfsproc_writecache_2_svc(void *ap, struct svc_req *rp)
{
static int ret;
@@ -381,9 +365,7 @@
attrstat *
-nfsproc_write_2(ap,rp)
- writeargs *ap;
- SR rp;
+nfsproc_write_2_svc(writeargs *ap, struct svc_req *rp)
{
static attrstat ret;
int fd;
@@ -442,9 +424,7 @@
diropres *
-nfsproc_create_2(ap,rp)
- createargs *ap;
- SR rp;
+nfsproc_create_2_svc(createargs *ap, struct svc_req *rp)
{
static diropres ret;
static nfs_fh handle;
@@ -545,9 +525,7 @@
nfsstat *
-nfsproc_remove_2(ap,rp)
- diropargs *ap;
- SR rp;
+nfsproc_remove_2_svc(diropargs *ap, struct svc_req *rp)
{
static nfsstat ret;
char *s;
@@ -587,9 +565,7 @@
nfsstat *
-nfsproc_rename_2(ap,rp)
- renameargs *ap;
- SR rp;
+nfsproc_rename_2_svc(renameargs *ap, struct svc_req *rp)
{
static nfsstat ret;
int uid;
@@ -643,9 +619,7 @@
nfsstat *
-nfsproc_link_2(ap,rp)
- linkargs *ap;
- SR rp;
+nfsproc_link_2_svc(linkargs *ap, struct svc_req *rp)
{
static nfsstat ret;
int uid;
@@ -694,9 +668,7 @@
nfsstat *
-nfsproc_symlink_2(ap,rp)
- symlinkargs *ap;
- SR rp;
+nfsproc_symlink_2_svc(symlinkargs *ap, struct svc_req *rp)
{
static nfsstat ret;
int uid;
@@ -743,9 +715,7 @@
}
diropres *
-nfsproc_mkdir_2(ap,rp)
- createargs *ap;
- SR rp;
+nfsproc_mkdir_2_svc(createargs *ap, struct svc_req *rp)
{
static diropres ret;
nfs_fh handle;
@@ -817,9 +787,7 @@
nfsstat *
-nfsproc_rmdir_2(ap,rp)
- diropargs *ap;
- SR rp;
+nfsproc_rmdir_2_svc(diropargs *ap, struct svc_req *rp)
{
static nfsstat ret;
char *s;
@@ -864,9 +832,7 @@
/* #define cfsclosedir(x) fhclosedir(x) */
readdirres *
-nfsproc_readdir_2(ap,rp)
- readdirargs *ap;
- SR rp;
+nfsproc_readdir_2_svc(readdirargs *ap, struct svc_req *rp)
{
static readdirres ret;
int uid;
@@ -991,9 +957,7 @@
}
statfsres *
-nfsproc_statfs_2(ap,rp)
- nfs_fh *ap;
- SR rp;
+nfsproc_statfs_2_svc(nfs_fh *ap, struct svc_req *rp)
{
static statfsres ret;
--- cfs-1.3.3.orig/cmkdir.c
+++ cfs-1.3.3/cmkdir.c
@@ -18,6 +18,10 @@
/*
* client cfs mkdir - 1.3.2
*/
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <stdio.h>
#include <rpc/rpc.h>
#include <sys/time.h>
@@ -50,6 +54,7 @@
unsigned char ek1[128];
unsigned int l;
int keycheck=1;
+ int rfd; /* File descriptor for /dev/random.*/
while (--argc && (**++argv == \'-\')) {
for (flg= ++*argv; *flg; ++flg)
@@ -131,6 +136,11 @@
if (smsize != LARGESMSIZE)
sprintf(pw,\"%s%d\",pword,smsize);
k.cipher=ciph;
+ rfd = open(\"/dev/random\", O_RDONLY);
+ if (rfd < 0) {
+ perror (\"/dev/random\");
+ exit (1);
+ }
if (cfmt==0) {
if (old_pwcrunch(pw,&k)!=0) {
fprintf(stderr,\"Invalid key\\n\");
@@ -145,7 +155,13 @@
/* now we xor in some truerand bytes for good measure */
bcopy(&k,ekey,32); /* assumes key material < 32 bytes */
for (i=0; i<32; i++) {
- ekey[i] ^= randbyte();
+ char b; /* Random byte */
+ if (1 != read (rfd, &b, 1))
+ {
+ perror (\"/dev/random read 1\");
+ exit (1);
+ }
+ ekey[i] ^= b;
}
encrypt_key(&k,ekey);
bcopy(ekey,ek1,32);
@@ -159,7 +175,12 @@
sprintf(path,\"%s/...\",argv[0]);
strcpy(str,\"qua!\");
/* now randomize the end of str.. */
- r = trand32();
+ if (sizeof (r) != read (rfd, &r, sizeof(r)))
+ {
+ perror (\"/dev/random read long\");
+ exit (1);
+ }
+ (void) close (rfd);
for (i=0; i<4; i++)
str[i+4]=(r<<(i*8))&0377;
copykey(&k,&kt);
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