libxml2: Denial of Service — GLSA 201009-07

Multiple Denial of Services vulnerabilities were found in libxml2.

Affected Packages

dev-libs/libxml2 on all architectures
Affected versions < 2.7.3-r2
Unaffected versions >= 2.7.3-r2

Background

libxml2 is a library to manipulate XML files.

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:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.7.3-r2"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since August 30, 2009. It is likely that your system is already no longer affected by this issue.

References

Release Date
September 21, 2010

Latest Revision
September 21, 2010: 01

Severity
normal

Exploitable
remote

Bugzilla entries