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AUSCERT External Security Bulletin Redistribution
ESB-97.136 -- Sun Security Bulletin #00157
29 October 1997
Sun Microsystems, Inc. has released the following advisory concerning a
vulnerability in the sysdef program. This vulnerability may allow
unprivileged users to read kernel memory which may contain sensitive
information such as unencrypted passwords. This can be leveraged to gain
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
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be done so in accordance with site policies and procedures.
Contact information for Sun is included in the Security Bulletin below.
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Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
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On call after hours for emergencies.
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00157
Date: October 28, 1997
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, 2.3,
(SunOS 5.5.1, 5.5, 5.4, 5.3) which relate to a vulnerability in sysdef.
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.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, 5.4_x86, 5.3
The vulnerability is fixed in Solaris 2.6.
3. Understanding the Vulnerability
The sysdef command displays the current system definition, listing hardware
devices, pseudo devices, system devices, loadable modules, and values of
selected kernel tunable parameters. This vulnerability, if exploited,
allows unprivileged users to read kernel memory which may contain sensitive
information such as unencrypted passwords. Attackers can subsequently use
the information to gain root access.
4. List of Patches
The vulnerability in sysdef is fixed by the following patches:
OS version Patch ID
SunOS 5.5.1 105092-01
SunOS 5.5.1_x86 105093-01
SunOS 5.5 105101-01
SunOS 5.5_x86 105102-01
SunOS 5.4 105099-01
SunOS 5.4_x86 105100-01
SunOS 5.3 105205-01
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:
These checksums may not apply if you obtain patches from your answer
File Name BSD SVR4 MD5
_______________ _________ __________ ________________________________
105092-01.tar.Z 18806 104 64648 207 CD282DB673136EE05FB63A59ADF04089
105093-01.tar.Z 29154 103 12815 206 521E2523DFCF6EB7476D40FAE17B4990
105101-01.tar.Z 10425 103 62933 205 E0F25757D958C4FF74B44471B6659532
105102-01.tar.Z 45898 102 45444 204 1E4953774F47C899EB25ACE8D0ED2B18
105099-01.tar.Z 64861 92 23604 183 E35540AC8BFCACED246F11A45E7BE55C
105100-01.tar.Z 61681 91 12641 182 F1C568E5D830D465B01B9892E19DDDAA
105205-01.tar.Z 65019 92 2573 183 951AB33FB3680E0F06C2182D34536725
Sun thanks Marko Laakso (University of Oulu, Finland) for his assistance in
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
Customers with Sun support contracts can also obtain patches from local
Sun answer centers and SunSITEs worldwide.
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