Sun Information for VU#569272

System V derived login contains a remotely exploitable buffer overflow

Status

Affected

Vendor Statement

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Sun Microsystems, Inc. Security Bulletin

Bulletin Number: #00213
Date: December 14, 2001
Cross-Ref: CERT Advisory CA-2001-34
Title: login
________________________________________________________________________________

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1. Bulletins Topics

Sun announces the release of patches for Solaris(tm) 8, 7, 2.6,
and 2.5.1 (SunOS(tm) 5.8, 5.7, 5.6, and 5.5.1) which
relate to a buffer overflow vulnerability in /bin/login.

Sun recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.8, 5.7, 5.6, and 5.5.1.

2. Who is Affected

Vulnerable: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
5.6_x86, 5.5.1, and 5.5.1_x86



3. Understanding the Vulnerability

The login command is used at the beginning of each terminal
session to identify oneself to the system. login is invoked
by the system when a connection is first established, after
the previous user has terminated the login shell by issuing
the exit command.

A buffer overflow has been discovered in login which may be
exploited by a local or a remote attacker to gain root access
on the affected system. This issue was discovered by ISS
X-Force who published an advisory at:

http://xforce.iss.net/alerts/advise105.php

CERT Advisory CA-2001-34 is available from:

http://www.cert.org/advisories/CA-2001-34.html

4. List of Patches

A Sun Security Bulletin is usually issued after patches are
available on SunSolve. In this case, while the patches are
not yet available, they are in the process of being pushed
to external servers and should be downloadable in a very
short time.

OS Version Patch ID
__________ _________
SunOS 5.8 111085-02
SunOS 5.8_x86 111086-02
SunOS 5.7 112300-01
SunOS 5.7_x86 112301-01
SunOS 5.6 105665-04
SunOS 5.6_x86 105666-04
SunOS 5.5.1 106160-02
SunOS 5.5.1_x86 106161-02

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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

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________________________________________________________________________________

Copyright 2001 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

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