[ GLSA 201009-07 ] libxml2: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: libxml2: Denial of Service (GLSA 201009-07)
Severity: normal
Exploitable: remote
Date: September 21, 2010
Bug(s): #280617
ID: 201009-07

Synopsis


Multiple Denial of Services vulnerabilities were found in libxml2.


Background


libxml2 is a library to manipulate XML files.


Affected Packages

Package: dev-libs/libxml2
Vulnerable: < 2.7.3-r2
Unaffected: >= 2.7.3-r2
Architectures: All supported architectures


Description


The following vulnerabilities were reported after a test with the
Codenomicon XML fuzzing framework:

• 
  Two use-after-free vulnerabilities are possible when parsing a XML file
  with Notation or Enumeration attribute types (CVE-2009-2416).
  
• 
  A stack consumption vulnerability can be triggered via a large depth of
  element declarations in a DTD, related to a function recursion
  (CVE-2009-2414).
  

Impact


A remote attacker could entice a user or automated system to open a
specially crafted XML document with an application using libxml2
resulting in a Denial of Service condition.


Workaround


There is no known workaround at this time.


Resolution


All libxml2 users should upgrade to the latest version: