Debian Long Term Support / LTS Security Information / 2015 / Security Information -- DLA-175-1 gnupg

Debian Security Advisory

DLA-175-1 gnupg -- LTS security update

Date Reported:

17 Mar 2015

Affected Packages:

gnupg

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 778652.
In Mitre's CVE dictionary: CVE-2014-3591, CVE-2015-0837, CVE-2015-1606.

More information:

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.