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/title/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
https://seclists.org/bugtraq/2016/Jun/115
https://access.redhat.com/security/cve/CVE-2016-4463