USN-2554-1: GnuPG vulnerabilities

01 April 2015

Several security issues were fixed in GnuPG.

Releases

Packages

  • gnupg - GNU privacy guard - a free PGP replacement
  • gnupg2 - GNU privacy guard - a free PGP replacement

Details

Daniel Genkin, Lev Pachmanov, Itamar Pipman, and Eran Tromer discovered
that GnuPG was susceptible to an attack via physical side channels. A local
attacker could use this attack to possibly recover private keys.
(CVE-2014-3591)

Daniel Genkin, Adi Shamir, and Eran Tromer discovered that GnuPG was
susceptible to an attack via physical side channels. A local attacker could
use this attack to possibly recover private keys. (CVE-2015-0837)

Hanno Böck discovered that GnuPG incorrectly handled certain malformed
keyrings. If a user or automated system were tricked into opening a
malformed keyring, a remote attacker could use this issue to cause GnuPG to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2015-1606, CVE-2015-1607)

In addition, this update improves GnuPG security by validating that the
keys returned by keyservers match those requested.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.10
Ubuntu 14.04
Ubuntu 12.04
Ubuntu 10.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-2339-1: gnupg
  • USN-2555-1: libgcrypt20, libgcrypt11-dev, libgcrypt11, libgcrypt11-doc, libgcrypt11-udeb
  • USN-2339-2: libgcrypt11-dev, libgcrypt11, libgcrypt11-udeb, libgcrypt11-doc