Published:
13 August 1997
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-97.103 -- Sun Security Bulletin #00149
Vulnerability in ps
14 August 1997
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Sun Microsystems, Inc has released the following advisory concerning a
vulnerability in ps. This vulnerability may allow local users to gain
root privileges. This vulnerability has been publically discussed and
reported in AUSCERT advisory AA-97.17 (Solaris 2.x ps Buffer Overflow
Vulnerability).
The following security bulletin is provided as a service to AUSCERT's
members. As AUSCERT did not write this document, AUSCERT has had no
control over its content. As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.
Contact information for Sun Microsystems, Inc is included in the Security
Bulletin below. If you have any questions or need further information,
please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/information/advisories.html
If you believe that your system has been compromised, contact AUSCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 4477
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00149
Date: August 12, 1997
Cross-Ref: AUSCERT 97.17
Title: Vulnerability in ps
________________________________________________________________________________
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.
Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
________________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, and 2.3
(SunOS 5.5.1, 5.5, 5.4, and 5.3), which relate to a vulnerability in the
ps program.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, 5.4, and 5.3. Exploit
information is publicly available.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, 5.4_x86, and 5.3.
Not vulnerable: All other supported versions of SunOS
The vulnerability is fixed in the upcoming release of Solaris.
3. Understanding the Vulnerability
The ps command prints information about active processes on a system.
Due to insufficient bounds checking on arguments supplied to ps, it is
possible to overwrite the internal data space of the ps program. As ps is
setuid root, this vulnerability may be exploited by users on a system to
gain root access.
4. List of Patches
The vulnerability in ps is fixed by the following patches:
OS version Patch ID
__________ ________
SunOS 5.5.1 105050-01
SunOS 5.5.1_x86 105051-01
SunOS 5.5 105052-01
SunOS 5.5_x86 105053-01
SunOS 5.4 102711-02
SunOS 5.4_x86 102712-02
SunOS 5.3 101545-03
5. Checksum Table
The checksum table below shows the BSD checksums (SunOS 5.x: /usr/ucb/sum),
SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures
for the above-mentioned patches that are available from:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
These checksums may not apply if you obtain patches from your answer
centers.
File Name BSD SVR4 MD5
_______________ _________ __________ _______________________________
105050-01.tar.Z 40975 131 26675 261 9E75E08487BAAAC785735188F09BD1A
105051-01.tar.Z 34192 132 34975 264 612A6C200D9BA69087FCD3EBA6DF3B2
105052-01.tar.Z 37362 131 3540 261 41EE88EBC09B3E90E4FAEAA7E59E818
105053-01.tar.Z 38180 126 31988 252 D57C2E934BAEE887535CBDB6E88D723
102711-02.tar.Z 12693 107 22447 214 DE783A43205F1290E8CCBEA6A313EDF
102712-02.tar.Z 16617 103 32208 205 DA1C0188D437E30934182CC23A648FC
101545-03.tar.Z 46772 107 49688 214 12CF86B80340842421DD284DAC7FDB0
_______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
Customers with Sun support contracts can also obtain patches from local
Sun answer centers and SunSITEs worldwide.
B. Sun security bulletins are available via World Wide Web at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins>
C. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
D. To receive information or subscribe to our CWS (Customer Warning System)
mailing list, send email to:
security-alert@sun.com
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Command Information Returned/Action Taken
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