Bulletin Number: 00203
Title: ypbind
Synopsis: ypbind
Cross-Ref: AUSCERT AA-2001.03
Create Date: June 21, 2001
Date: June 21, 2001
________________________________________________________________________________
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________________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris(tm) 8, 7, 2.6,
2.5.1, 2.5, and 2.4 (SunOS(tm) 5.8, 5.7, 5.6, 5.5.1, 5.5, and
5.4) which relate to a buffer overflow vulnerability in ypbind.
Sun recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.8, 5.7, 5.6, 5.5.1, 5.5,
and 5.4
2. Who is Affected
Vulnerable: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
5.6_x86, 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, and 5.4_x86
Not vulnerable: SunOS 5.8 01/01* and SunOS 5.8_x86 01/01*
and all later SunOS 5.8 update releases.
SunOS 5.8 and SunOS 5.8_x86 with
Maintenance Update (MU) 3* or a later MU
applied.
* To determine if one is running SunOS 5.8 01/01 or later or SunOS 5.8
Maintenance Update 3 or later, check the contents of the /etc/release file.
3. Understanding the Vulnerability
The ypbind daemon runs on all client and server machines that are set
up to use NIS. A buffer overflow vulnerability has been discovered in
ypbind which may be exploited by a local or a remote attacker to gain
root access.
4. List of Patches
The following patches are available in relation to the above problems.
OS Version Patch ID
__________ _________
SunOS 5.8 110322-01
SunOS 5.8_x86 110323-01
SunOS 5.7 108750-02
SunOS 5.7_x86 108751-02
SunOS 5.6 105403-04
SunOS 5.6_x86 105404-04
SunOS 5.5.1 105165-04
SunOS 5.5.1_x86 105166-04
SunOS 5.5 105169-04
SunOS 5.5_x86 105170-04
SunOS 5.4 101973-41
SunOS 5.4_x86 101974-41
_______________________________________________________________________________
Sun acknowledges with thanks, AusCERT as well as Mark Dowd and Stephen
James of IT Audit & Consulting, for bringing this issue to our attention
and their assistance in the preparation of this bulletin.
_______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers at:
http://sunsolve.sun.com/securitypatch
B. Checksums for the patches listed in this bulletin are available at:
ftp://sunsolve.sun.com/pub/patches/CHECKSUMS
C. Sun security bulletins are available at:
http://sunsolve.sun.com/security
D. Sun Security Coordination Team's PGP key is available at:
http://sunsolve.sun.com/pgpkey.txt
E. 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
F. To receive information or subscribe to our CWS (Customer Warning System)
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