Debian Security Advisory
DLA-175-1 gnupg -- LTS security update
- Date Reported:
- 17 Mar 2015
- Affected Packages:
- 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:
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.