_____________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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_____________________________________________________
INFORMATION BULLETIN
UNIX sendmail Vulnerabilities Update
January 7, 1994 0900 PST Number E-07
______________________________________________________________________________
PROBLEM: Vulnerabilities in the UNIX sendmail utility.
PLATFORM: All implementations of UNIX sendmail.
DAMAGE: Local and remote users may execute commands and/or gain access to
system files.
SOLUTION: Apply workarounds or install patched version of sendmail on ALL
systems running sendmail.
______________________________________________________________________________
Critical Information about UNIX sendmail Vulnerabilities
This advisory updates the sendmail information contained in CIAC Advisory
E-03.
CIAC has learned of several vendor security patches addressing the
vulnerabilities in the UNIX utility sendmail described in CIAC Advisory E-03.
These vulnerabilities include the ability of local and remote users to execute
commands and write to system files on systems running sendmail, including
those systems behind firewalls.
CIAC Advisory E-03 described a set of workarounds to be used in the absence of
vendor patches. These may still be safely used even after vendor patches have
been installed.
The CERT Coordination Center is maintaining a list of vendor information on
available security patches for sendmail. It is available via anonymous FTP
from info.cert.org (IP 192.88.209.5) in /pub/cert_advisories/CA-93:16a.README.
A brief summary is provided below, and the current version of this file is
appended at the end of this bulletin.
Vendor Patch Status
----------------------------- --------------
sendmail 8.6.4 Available
IDA sendmail Available
BSDI Available
Data General Corporation Available
Digital Equipment Corporation Available
Hewlett-Packard Company Available
IBM Available
NeXT, Inc. Available soon
The Santa Cruz Operation Available soon
Sequent Computer Systems Available
Solbourne Available
Sony Corporation Available
Sun Microsystems, Inc. Available
______________________________________________________________________________
CIAC wishes to thank the CERT Coordination Center and the vendor community for
their response to this problem.
______________________________________________________________________________
For additional information or assistance, please contact CIAC:
Voice: (510) 422-8193
FAX: (510) 423-8002
STU-III: (510) 423-2604
E-mail: ciac@llnl.gov
Previous CIAC Bulletins and other information are available via anonymous FTP
from irbis.llnl.gov (IP address 128.115.19.60).
______________________________________________________________________________
PLEASE NOTE: Many users outside of the DOE and ESnet computing communities
receive CIAC bulletins. If you are not part of these communities, please
contact your agency's response team to report incidents. Your agency's team
will coordinate with CIAC. The Forum of Incident Response and Security Teams
(FIRST) is a world-wide organization. A list of FIRST member organizations
and their constituencies can be obtained by sending email to
docserver@first.org with an empty subject line and a message body containing
the line: send first-contacts.
This document was prepared as an account of work sponsored by an agency of the
United States Government. Neither the United States Government nor the
University of California nor any of their employees, makes any warranty,
expressed or implied, or assumes any legal liability or responsibility for the
accuracy, completeness, or usefulness of any information, product, or process
disclosed, or represents that its use would not infringe privately owned
rights. Reference herein to any specific commercial products, process, or
service by trade name, trademark manufacturer, or otherwise, does not
necessarily constitute or imply its endorsement, recommendation, or favoring
by the United States Government or the University of California. The views
and opinions of authors expressed herein do not necessarily state or reflect
those of the United States Government nor the University of California, and
shall not be used for advertising or product endorsement purposes.
______________________________________________________________________________
CA-93:16a.README
Rev. January 7, 1994
This file is a supplement to the CERT Advisory CA-93:16a of January 7, 1994,
and will be updated as additional information becomes available.
The following is vendor-supplied information. Please notice that
some entries provide pointers to vendor advisories. For more up-to-date
information, contact your vendor.
-------------
Eric Allman, 8.6.4
Version 8.6.4 is available for anonymous FTP from ftp.cs.berkeley.edu
in the "ucb/sendmail" directory.
Standard Unix Sum
sendmail.8.6.4.base.tar.Z: 07718 428
System V Sum
64609 856 sendmail.8.6.4.base.tar.Z
MD5 Checksum
MD5 (sendmail.8.6.4.base.tar.Z) = 59727f2f99b0e47a74d804f7ff654621
-------------
Paul Pomes, IDA:
A new release is available for anonymous FTP from vixen.cso.uiuc.edu
as "pub/sendmail-5.67b+IDA-1.5.tar.gz".
Standard Unix Sum
sendmail-5.67b+IDA-1.5.tar.gz: 17272 1341
System V Sum
30425 2682 sendmail-5.67b+IDA-1.5.tar.gz
MD5 Checksum
MD5 (sendmail-5.67b+IDA-1.5.tar.gz) = a9b8e17fd6d3e52739d2195cead94300
-------------
BSDI
BSDI can supply either an easy-to-install port of the smrsh patch from
CERT or a port of sendmail-8.6.4 (contact BSDI Customer Support for
information in obtaining either of these solutions). In future
releases, BSDI will ship the newer sendmail that is not affected
by these problems. Releases affected by this advisory: BSD/386 V1.0.
BSDI Contact Information:
BSDI Customer Support
Berkeley Software Design, Inc.
7759 Delmonico Drive
Colorado Springs, CO 80919
Toll Free: +1 800 ITS BSD8 (+1 800 486 2738)
Phone: +1 719 260 8114
Fax: +1 719 598 4238
Email: support@bsdi.com
-------------
Data General Corporation
Patches are available from dg-rtp.rtp.dg.com (128.222.1.2) in
the directory "deliver/sendmail":
Rev Patch Number Sys V Checksum
------------ ------------------ --------
5.4.2 tcpip_5.4.2.p14 39298 512
MD5 (tcpip_5.4.2.p14) = c80428e3b791d4e40ebe703ba5bd249c
5.4R2.01 tcpip_5.4R2.01.p12 65430 512
MD5 (tcpip_5.4R2.01.p12) = 9c84cfdb4d79ee22224eeb713a414996
5.4R2.10 tcpip_5.4R2.10.p05 42625 512
MD5 (tcpip_5.4R2.10.p05) = 2d74586ff22e649354cc6a02f390a4be
These patches are loadable via the "syadm" utility and installation
instructions are included in the patch notes.
Trusted versions of DG/UX will use the same patches as
their base version of DG/UX.
Customers with any questions about these patches should contact
their local SEs or Sales Representatives.
-------------
Digital Equipment Corporation
Systems affected: ULTRIX Versions 4.3 (VAX), ULTRIX V4.3 & V4.3A (RISC),
DEC OSF/1 V1.2 & V1.3, using sendmail. The following patches are
available from your normal Digital support channel:
ULTRIX V4.3 (VAX), V4.3 (RISC) or V4.3a (RISC): CSCPAT #: CSCPAT_4044
OSF/1 V1.2 and V1.3: CSCPAT #: CSCPAT_4045
*These fixes will be included in future releases of ULTRIX and DEC OSF/1
Digital Equipment Corporation strongly urges Customers to upgrade
to a minimum of ULTRIX V4.3 or DEC OSF/1 V1.2, then apply the
Security kit to prevent this potential vulnerability.
The full text of Digital's advisory can be found in
/pub/vendors/dec/advisories/sendmail on info.cert.org.
-------------
Hewlett-Packard Company
For HP/UX, the following patches are available:
PHNE_3369 (series 300/400, HP-UX 8.x), or
PHNE_3370 (series 300/400, HP-UX 9.x), or
PHNE_3371 (series 700/800, HP-UX 8.x), or
PHNE_3372 (series 700/800, HP-UX 9.x), or
modify the sendmail configuration file (releases of HP-UX
prior to 8.0)
These patches may be obtained from HP via FTP (this is NOT
anonymous FTP) or the HP SupportLine. To obtain HP security
patches, you must first register with the HP SupportLine.
The registration instructions are available via
anonymous FTP at info.cert.org in the file
"pub/vendors/hp/supportline_and_patch_retrieval".
The full text of Hewlett-Packard's advisory can be found in
/pub/vendors/hp/advisories/sendmail on info.cert.org.
-------------
IBM
Patches for these problems can be ordered as APAR# ix40304 and
APAR# ix41354. Ix40304 is available now and ix41354 will be
sent as soon as it is available.
-------------
NeXT, Inc.
NeXT expects to have patches available soon.
-------------
The Santa Cruz Operation
Support level Supplement (SLS) net379A, will soon be available
for the following platforms:
SCO TCP/IP Release 1.2.0 for SCO UNIX or SCO XENIX
SCO TCP/IP Release 1.2.1 for SCO UNIX
SCO Open Desktop Release 2.0, 3.0
SCO Open Desktop Lite Release 3.0
SCO Open Server Network System, Release 3.0
SCO Open Server Enterprise System, Release 3.0
This SLS is currently orderable from SCO Support for all customers
who have one of the above products registered. It will be available
in the near future. Systems using MMDF as their mail system do
not need this SLS.
-------------
Sequent Computer Systems
Versions 3.0.17 and greater of Dynix are vulnerable
as are versions 2.2 and 2.3 of the TCP package for PTX.
Sequent customers should call the Sequent Hotline at
(800) 854-9969 and ask for the Sendmail Maintenance Release Tape.
Alternatively, ptx customers can upgrade to PTX/TCP/IP
version 2.2.3 or 2.3.1 as appropriate.
-------------
Solbourne
Patch p93122301 is available from Solboune to fix the sendmail
problems. This patch is equivalent to Sun patch 100377-08.
Customers may retrieve it via anonymous FTP from
solbourne.solbourne.com in the pub/support/OS4.1B directory:
Filename BSD SVR4
Checksum Checksum
--------------- --------- ---------
p93122301.tar.Z 63749 211 53951 421
MD5 (p93122301.tar.Z) = f7300f3ecfbbbfaa11a6695f42f14615
It is also available by sending email to solis@solbourne.com
and specifying "get patches/4.1b p93122301" in the body of the
mail message.
Earlier versions (4.1A.*) are no longer supported. The 4.1B
patch may well work on 4.1A.* systems but this has not been tested.
If you have any questions please call the SOURCE at 1-800-447-2861 or
send email to support@solbourne.com.
The full text of Solbourne's advisory can be found in
/pub/vendors/solbourne/advisories/sendmail on info.cert.org.
---------------
Sony Corporation
These vulnerabilities have been fixed in NEWS-OS 6.0.1.
A patch is available for NEWS-OS 4.x. Customers should
contact their dealers for any additional information.
---------------
Sun Microsystems, Inc.
Sun has made patches for sendmail available as described in
their SUN MICROSYSTEMS SECURITY BULLETIN: #00125, 12/23/93.
These patches can be found in the
/systems/sun/sun-dist directory on ftp.uu.net:
System Patch ID Filename BSD SVR4
Checksum Checksum
------ -------- --------------- --------- ---------
SunOS 4.1.x 100377-08 100377-08.tar.Z 05320 755 58761 1510
Solaris 2.1 100840-06 100840-06.tar.Z 59489 195 61100 390
Solaris 2.2 101077-06 101077-06.tar.Z 63001 179 28185 358
Solaris 2.3 101371-03 101371-03.tar.Z 27539 189 51272 377
MD5 checksums are:
MD5 (100377-08.tar.Z) = 8e8a14c0a46b6c707d283cacd85da4f1
MD5 (100840-06.tar.Z) = 7d8d2c7ec983a58b4c6a608bf1ff53ec
MD5 (101077-06.tar.Z) = 78e165dec0b8260ca6a5d5d9bdc366b8
MD5 (101371-03.tar.Z) = 687d0f3287197dee35941b9163812b56
A patch for x86 based systems will be forthcoming as patch 101352-02.
4.1 sites installing these patches may require sites to modify
their configuration files slightly. Full details are given in
the Sun advisory.
The full text of Sun Microsystems's advisory can be found in
/pub/vendors/sun/advisories/sendmail on info.cert.org.
-------------
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