Debian Security Advisory

DSA-3185-1 libgcrypt11 -- security update

Date Reported:
12 Mar 2015
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2014-3591, CVE-2015-0837.
More information:

Multiple vulnerabilities were discovered in libgcrypt:

  • 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.

For the stable distribution (wheezy), these problems have been fixed in version 1.5.0-5+deb7u3.

We recommend that you upgrade your libgcrypt11 packages.