[ GLSA 200403-01 ] Libxml2 URI Parsing Buffer Overflow Vulne

[pahud]

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Gentoo Linux Security Advisory GLSA 200403-01
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~ http://security.gentoo.org
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~ Severity: Normal
~ Title: Libxml2 URI Parsing Buffer Overflow Vulnerabilities
~ Date: March 06, 2004
~ Bugs: #42735
~ ID: 200403-01

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Synopsis
========

A buffer overflow has been discovered in libxml2 versions prior to
2.6.6 which may be exploited by an attacker allowing the execution of
arbitrary code.

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

Yuuichi Teranishi discovered a flaw in libxml2 versions prior to 2.6.6.
When the libxml2 library fetches a remote resource via FTP or HTTP,
libxml2 uses parsing routines that can overflow a buffer caused by
improper bounds checking if they are passed a URL longer than 4096
bytes.

Impact
======

If an attacker is able to exploit an application using libxml2 that
parses remote resources, then this flaw could be used to execute
arbitrary code.

Workaround
==========

No workaround is available; users are urged to upgrade libxml2 to
2.6.6.

Resolution
==========

All users are recommended to upgrade their libxml2 installation:

~ # emerge sync
~ # emerge -pv ">=dev-libs/libxml2-2.6.6"
~ # emerge ">=dev-libs/libxml2-2.6.6"

References
==========

~ [ 1 ] http://cve.mitre.org/cgi-bin/cvename.cg ... -2004-0110

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.

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