(RHSA-2011:0616) Low: pidgin security and bug fix update

Pidgin is an instant messaging program which can log in to multiple
accounts on multiple instant messaging networks simultaneously.

Multiple NULL pointer dereference flaws were found in the way the Pidgin
Yahoo! Messenger Protocol plug-in handled malformed YMSG packets. A remote
attacker could use these flaws to crash Pidgin via a specially-crafted
notification message. (CVE-2011-1091)

Red Hat would like to thank the Pidgin project for reporting these issues.
Upstream acknowledges Marius Wachtler as the original reporter.

This update also fixes the following bugs:

• Previous versions of the pidgin package did not properly clear certain
  data structures used in libpurple/cipher.c when attempting to free them.
  Partial information could potentially be extracted from the incorrectly
  cleared regions of the previously freed memory. With this update, data
  structures are properly cleared when freed. (BZ#684685)

• This erratum upgrades Pidgin to upstream version 2.7.9. For a list of all
  changes addressed in this upgrade, refer to
  http://developer.pidgin.im/wiki/ChangeLog (BZ#616917)

• Some incomplete translations for the kn_IN and ta_IN locales have been
  corrected. (BZ#633860, BZ#640170)

Users of pidgin should upgrade to these updated packages, which resolve
these issues. Pidgin must be restarted for this update to take effect.