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

[Tim Yamin <plasmaroo () gentoo org>]

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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.cgi?name=CAN-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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