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AUSCERT External Security Bulletin Redistribution
ESB-2006.0715 -- [SUN]
Sun Cobalt sendmail(8) Security Issue Involving Signal Handling Daemon
29 September 2006
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AusCERT Security Bulletin Summary
---------------------------------
Product: sendmail(8)
Publisher: Sun Microsystems
Operating System: Sun Cobalt RaQ XTR Server
Sun Cobalt RaQ 4 Server
Sun Cobalt RaQ 550 Server
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2006-0058
Ref: AL-2006.0020
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102324-1
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Sun(sm) Alert Notification
* Sun Alert ID: 102324
* Synopsis: Sun Cobalt sendmail(8) Security Issue Involving Signal
Handling Daemon
* Category: Security
* Product: Sun Cobalt RaQ XTR Server, Sun Cobalt RaQ 4 Server, Sun
Cobalt RaQ 550 Server
* BugIDs: 17084, 17085, 17086
* Avoidance: Workaround, Patch
* State: Resolved
* Date Released: 25-Apr-2006, 27-Sep-2006
* Date Closed: 27-Sep-2006
* Date Modified: 27-Sep-2006
1. Impact
A local or remote unprivileged user may be able to execute arbitrary
code with elevated privileges or cause a Denial of Service (DoS)
condition on a Sun Cobalt system due to a security vulnerability in
the sendmail(8) daemon involving signal handling.
This issue is referenced in the following documents:
CERT VU#834865 http://www.kb.cert.org/vuls/id/834865 which is
referenced in CERT Technical Cyber Security Alert TA06-081A:
http://www.us-cert.gov/cas/techalerts/TA06-081A.html
2. Contributing Factors
This issue can occur in the following releases:
* RaQ4 with sendmail versions 8.10.2-C4stackguard or earlier
* RaQ550 with sendmail versions 8.11.6-1C6stackguard or earlier
* RaQXTR with sendmail versions 8.11.6-1C6stackguard or earlier
with the sendmail(8) service enabled.
The sendmail package version can be determined by running the
following command:
# rpm -qa | grep -i sendmail
sendmail-8.11.6-1C6stackguard
To determine whether sendmail(8) is enabled for the various run
levels, the following command can be used:
# /sbin/chkconfig --list sendmail
sendmail 0:off 1:off 2:off 3:on 4:on 5:on 6:off
3. Symptoms
There are no reliable symptoms that would indicate this issue has been
exploited to execute arbitrary commands with elevated privileges on a
system. The symptoms of the Denial of Service would be the sendmail
daemon no longer running.
4. Relief/Workaround
To work around the described issue, sites may wish to block access to
the affected service from untrusted networks such as the Internet, or
disable the sendmail daemon where possible. Use a firewall or other
packet-filtering technology to block the appropriate network ports.
Consult your vendor or your firewall documentation for detailed
instructions on how to configure the ports.
The following command can be used to temporarily disable sendmail for
all run levels:
# /sbin/chkconfig --del sendmail
5. Resolution
This issue is addressed in the following releases:
* RaQ550 at
ftp://ftp.cobalt.sun.com/pub/packages/raq550/all/RaQ550-All-Sec
urity-0.0.1-17084.pkg
* RaQ4 at
ftp://ftp.cobalt.sun.com/pub/packages/raq4/jpn/RaQ4-All-Securit
y-2.0.2-17084.pkg
* RaQ XTR at
ftp://ftp.cobalt.sun.com/pub/packages/raqxtr/eng/RaQXTR-All-Sec
urity-1.0.1-17084.pkg and
* ftp://ftp.cobalt.sun.com/pub/packages/raqxtr/jpn/RaQXTR-All-Sec
urity-1.0.1-17084.pkg
Change History
27-Sep-2006:
* Updated Resolution section
* State: Resolved
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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