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[SECURITY] [DLA 175-1] gnupg security update

Package        : gnupg
Version        : 1.4.10-4+squeeze7
CVE ID         : CVE-2014-3591 CVE-2015-0837 CVE-2015-1606
Debian Bug     : 778652

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


    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.


    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.


    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.

Raphaël Hertzog ◈ Debian Developer

Support Debian LTS: http://www.freexian.com/services/debian-lts.html
Learn to master Debian: http://debian-handbook.info/get/

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