Synopsis:    Low: pidgin security and bug fix update
Issue Date:  2011-05-19
CVE Numbers: CVE-2011-1091


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.

SL6:
   x86_64
      pidgin-perl-2.7.9-3.el6.x86_64.rpm
      libpurple-2.7.9-3.el6.i686.rpm
      libpurple-2.7.9-3.el6.x86_64.rpm
      libpurple-devel-2.7.9-3.el6.i686.rpm
      libpurple-devel-2.7.9-3.el6.x86_64.rpm
      libpurple-perl-2.7.9-3.el6.x86_64.rpm
      libpurple-tcl-2.7.9-3.el6.x86_64.rpm
      pidgin-2.7.9-3.el6.x86_64.rpm
      pidgin-debuginfo-2.7.9-3.el6.i686.rpm
      pidgin-debuginfo-2.7.9-3.el6.x86_64.rpm
      pidgin-devel-2.7.9-3.el6.i686.rpm
      pidgin-devel-2.7.9-3.el6.x86_64.rpm
      pidgin-docs-2.7.9-3.el6.x86_64.rpm
      finch-devel-2.7.9-3.el6.x86_64.rpm
      finch-devel-2.7.9-3.el6.i686.rpm
      finch-2.7.9-3.el6.x86_64.rpm
      finch-2.7.9-3.el6.i686.rpm
   i386
      finch-devel-2.7.9-3.el6.i686.rpm
      libpurple-2.7.9-3.el6.i686.rpm
      libpurple-devel-2.7.9-3.el6.i686.rpm
      libpurple-perl-2.7.9-3.el6.i686.rpm
      libpurple-tcl-2.7.9-3.el6.i686.rpm
      pidgin-2.7.9-3.el6.i686.rpm
      pidgin-debuginfo-2.7.9-3.el6.i686.rpm
      pidgin-devel-2.7.9-3.el6.i686.rpm
      pidgin-docs-2.7.9-3.el6.i686.rpm
      pidgin-perl-2.7.9-3.el6.i686.rpm
      finch-2.7.9-3.el6.i686.rpm

- Scientific Linux Development Team