gnupg - security update

Multiple vulnerabilities were discovered in GnuPG, the GNU Privacy Guard:

• CVE-2014-3591
  The Elgamal decryption routine was susceptible to a side-channel
  attack discovered by researchers of Tel Aviv University. Ciphertext
  blinding was enabled to counteract it. Note that this may have a quite
  noticeable impact on Elgamal decryption performance.
• CVE-2015-0837
  The modular exponentiation routine mpi_powm() was susceptible to a
  side-channel attack caused by data-dependent timing variations when
  accessing its internal pre-computed table.
• CVE-2015-1606
  The keyring parsing code did not properly reject certain packet types
  not belonging in a keyring, which caused an access to memory already
  freed. This could allow remote attackers to cause a denial of service
  (crash) via crafted keyring files.

For the oldstable distribution (squeeze), those problems have been fixed in
version 1.4.10-4+squeeze7.

For the stable distribution (wheezy), these problems have been fixed in
version 1.4.12-7+deb7u7.

We recommend that you upgrade your gnupg packages.