(RHSA-2011:0486) Moderate: xmlsec1 security and bug fix update

The XML Security Library is a C library based on libxml2 and OpenSSL that
implements the XML Digital Signature and XML Encryption standards.

A flaw was found in the way xmlsec1 handled XML files that contain an XSLT
transformation specification. A specially-crafted XML file could cause
xmlsec1 to create or overwrite an arbitrary file while performing the
verification of a file’s digital signature. (CVE-2011-1425)

Red Hat would like to thank Nicolas Gregoire and Aleksey Sanin for
reporting this issue.

This update also fixes the following bug:

• xmlsec1 previously used an incorrect search path when searching for
  crypto plug-in libraries, possibly trying to access such libraries using a
  relative path. (BZ#558480, BZ#700467)

Users of xmlsec1 should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the update,
all running applications that use the xmlsec1 library must be restarted for
the update to take effect.