libxml2 -- multiple vulnerabilities

Secunia reports:

Two vulnerabilities have been reported in Libxml2, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
to potentially compromise an application using the library.

1. An integer overflow error in the “xmlSAX2Characters()” function
   can be exploited to trigger a memory corruption via a specially
   Successful exploitation may allow execution of arbitrary code, but
   requires e.g. that the user is tricked into processing an overly
   large XML file (2GB or more).
2. An integer overflow error in the “xmlBufferResize()” function
   can be exploited to trigger the execution of an infinite loop.
   The vulnerabilities are reported in version 2.7.2.
   Other versions may also be affected.