Red Hat Security Advisory 2012-0143-01 - XULRunner provides the XUL Runtime environment for applications using the Gecko layout engine. A heap-based buffer overflow flaw was found in the way XULRunner handled PNG images. A web page containing a malicious PNG image could cause an application linked against XULRunner to crash or, potentially, execute arbitrary code with the privileges of the user running the application. All XULRunner users should upgrade to these updated packages, which correct this issue. After installing the update, applications using XULRunner must be restarted for the changes to take effect.
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