Ubuntu Security Notice USN-2554-1
1st April, 2015
gnupg, gnupg2 vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary
Several security issues were fixed in GnuPG.
Software description
- 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 version:
- Ubuntu 14.10:
-
gnupg2
2.0.24-1ubuntu2.2
-
gnupg
1.4.16-1.2ubuntu1.2
- Ubuntu 14.04 LTS:
-
gnupg2
2.0.22-3ubuntu1.3
-
gnupg
1.4.16-1ubuntu2.3
- Ubuntu 12.04 LTS:
-
gnupg2
2.0.17-2ubuntu2.12.04.6
-
gnupg
1.4.11-3ubuntu2.9
- Ubuntu 10.04 LTS:
-
gnupg
1.4.10-2ubuntu1.8
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.