[arch-security] [ASA-201607-2] xerces-c: denial of service

[Levente Polyak]

Arch Linux Security Advisory ASA-201607-2
=========================================

Severity: Medium
Date    : 2016-07-05
CVE-ID  : CVE-2016-4463
Package : xerces-c
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package xerces-c before version 3.1.4-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 3.1.4-1.

# pacman -Syu "xerces-c>=3.1.4-1"

The problem has been fixed upstream in version 3.1.4.

Workaround
==========

None.

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

The Xerces-C XML parser fails to successfully parse a DTD that is
deeply nested, and this causes a stack overflow, which makes a denial
of service attack against many applications possible by an
unauthenticated attacker.

Impact
======

A remote attacker is able to use a specially crafted XML document that,
when processed, is leading to application crash resulting in denial of
service.

References
==========

https://xerces.apache.org/xerces-c/secadv/CVE-2016-4463.txt
http://seclists.org/bugtraq/2016/Jun/115
https://access.redhat.com/security/cve/CVE-2016-4463

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