intrigeri uploaded new packages for pidgin which fixed the following security
problems:

CVE-2013-6477
  Jaime Breva Ribes discovered that a remote XMPP user can trigger a crash by
  sending a message with a timestamp in the distant future.

CVE-2013-6478
  Pidgin could be crashed through overly wide tooltip windows.

CVE-2013-6479
  Jacob Appelbaum discovered that a malicious server or a "man in the middle"
  could send a malformed HTTP header resulting in denial of service.

CVE-2013-6481
  Daniel Atallah discovered that Pidgin could be crashed through malformed
  Yahoo! P2P messages.

CVE-2013-6482
  Fabian Yamaguchi and Christian Wressnegger discovered that Pidgin could be
  crashed through malformed MSN messages.

CVE-2013-6483
  Fabian Yamaguchi and Christian Wressnegger discovered that Pidgin could be
  crashed through malformed XMPP messages.

CVE-2013-6484
  It was discovered that incorrect error handling when reading the response from
  a STUN server could result in a crash.

CVE-2013-6485
  Matt Jones discovered a buffer overflow in the parsing of malformed
  HTTP responses.

CVE-2013-6487
  Yves Younan and Ryan Pentney discovered a buffer overflow when parsing
  Gadu-Gadu messages.

CVE-2013-6489
  Yves Younan and Pawel Janic discovered an integer overflow when parsing
  MXit emoticons.

CVE-2013-6490
  Yves Younan discovered a buffer overflow when parsing SIMPLE headers.

CVE-2014-0020
  Daniel Atallah discovered that Pidgin could be crashed via malformed
  IRC arguments.

For the squeeze-backports distribution the problems have been fixed in version
2.10.9-1~bpo60+1.

For the oldstable distribution (squeeze), no direct backport is provided.
One should use the fixed package from squeeze-backports instead.

For the stable distribution (wheezy), these problems have been fixed in version
2.10.9-1~deb7u1.

For the unstable distribution (sid), these problems have been fixed in version
2.10.9-1.