CERT* Vendor-Initiated Bulletin VB-97.15
December 2, 1997
Topic: Vulnerability in nis_cachemgr
Source: Sun Microsystems, Inc.
To aid in the wide distribution of essential security information, the
CERT Coordination Center is forwarding the following information from
Sun Microsystems, Inc. Sun urges you to act on this information as soon as
possible. Sun contact information is included in the forwarded
text below; please contact them if you have any questions or need
Please note that since the original publication of this information by
Sun Microsystems, some of the patches have been updated. Patch number
101973 has been updated to revision 33 (101973-33), and patch
number 101974 has been updated to revision 33 (101974-33). MD5
checksums are shown below:
These patches are also available at
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00155
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, and 2.4
(SunOS 5.5.1, 5.5, and 5.4) which relate to a vulnerability in
Sun estimates that the release of a patch for Solaris 2.3 (SunOS 5.3)
that relate to the same vulnerability will be available within 4 weeks
of the date of this bulletin.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, and 5.4 which use
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
Not vulnerable: All other supported versions of SunOS.
The vulnerability does not exist in Solaris 2.6.
3. Understanding the Vulnerability
NIS+ clients run nis_cachemgr, a NIS+ utility that caches location
information about NIS+ servers. This vulnerability, if exploited, allows
attackers to add bogus directory objects to the global shared cache, in
effect specifying rogue NIS+ servers that are under their control.
4. List of Patches
The vulnerability in nis_cachemgr is fixed by the following patches:
OS version Patch ID
SunOS 5.5.1 103612-33
SunOS 5.5.1_x86 103613-32
SunOS 5.5 103187-29
SunOS 5.5_x86 103188-29
SunOS 5.4 101973-32
SunOS 5.4_x86 101974-32
SunOS 5.3 101318-89 (to be released in 4 weeks)
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
_______________ __________ __________ ________________________________
103612-33.tar.Z 42409 3248 60555 6495 63408A137DBE6BEEDAECFA49674F0E5A
103613-32.tar.Z 08972 2939 41390 5878 E613588ADA2845DA2CEDE801FE247ED2
103187-29.tar.Z 47938 3240 14585 6479 D681C0BB1C4267418AEB20F56DDE7FD3
103188-29.tar.Z 36871 2919 14150 5838 F7184B433BF9EDCBA99E81D2039F355A
101973-32.tar.Z 55144 956 44485 1911 A802DA901090B52A27BDC6AE0D386C13
101974-32.tar.Z 41770 826 48991 1652 91AB26639B6CB0902ADE354999751826
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.
B. Sun security bulletins are available via World Wide Web at:
C. Sun Security Coordination Team's PGP key is available via World Wide Web
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This file: ftp://ftp.cert.org/pub/cert_bulletins/VB-97.15.nis_cachemgr
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