GLSA 200707-14 tcpdump: Integer overflow
Posted on: 07/29/2007 12:00 AM

A new security update has been released for Gentoo Linux - tcpdump: Integer overflow. Here the announcement:

Gentoo Linux Security Advisory GLSA 200707-14
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http://security.gentoo.org/
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Severity: High
Title: tcpdump: Integer overflow
Date: July 28, 2007
Bugs: #184815
ID: 200707-14

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Synopsis
========

A vulnerability has been discovered in tcpdump, allowing for the
execution of arbitrary code, possibly with root privileges.

Background
==========

tcpdump is a tool for capturing and inspecting network traffic.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/tcpdump lt; 3.9.5-r3 gt;= 3.9.5-r3

Description
===========

mu-b from Digital Labs discovered that the return value of a snprintf()
call is not properly checked before being used. This could lead to an
integer overflow.

Impact
======

A remote attacker could send specially crafted BGP packets on a network
being monitored with tcpdump, possibly resulting in the execution of
arbitrary code with the privileges of the user running tcpdump, which
is usually root.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All tcpdump users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-analyzer/tcpdump-3.9.5-r3"

References
==========

[ 1 ] CVE-2007-3798
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3798

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200707-14.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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