Date: Thu, 04 Oct 2007 23:45:55 +0200
From: Pierre-Yves Rofes <py@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200710-01 ] RPCSEC_GSS library: Buffer overflow
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Gentoo Linux Security Advisory GLSA 200710-01
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http://security.gentoo.org/
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Severity: High
Title: RPCSEC_GSS library: Buffer overflow
Date: October 04, 2007
Bugs: #191479
ID: 200710-01
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Synopsis
========
A buffer overflow vulnerability has been discovered in librpcsecgss.
Background
==========
librpcsecgss is an implementation of RPCSEC_GSS for secure RPC
communications.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-libs/librpcsecgss < 0.16 >= 0.16
Description
===========
A stack based buffer overflow has been discovered in the
svcauth_gss_validate() function in file lib/rpc/svc_auth_gss.c when
processing an overly long string in a RPC message.
Impact
======
A remote attacker could send a specially crafted RPC request to an
application relying on this library, e.g NFSv4 or Kerberos
(GLSA-200709-01), resulting in the execution of arbitrary code with the
privileges of the user running the application.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All librpcsecgss users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/librpcsecgss-0.16"
References
==========
[ 1 ] CVE-2007-3999
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3999
[ 2 ] GLSA-200709-01
http://www.gentoo.org/security/en/glsa/glsa-200709-01.xml
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200710-01.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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