USN-1987-1: GnuPG vulnerabilities

Releases

• Ubuntu 13.04
• Ubuntu 12.10
• Ubuntu 12.04
• Ubuntu 10.04

Packages

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

Details

Daniel Kahn Gillmor discovered that GnuPG treated keys with empty usage
flags as being valid for all usages. (CVE-2013-4351)

Taylor R Campbell discovered that GnuPG incorrectly handled certain OpenPGP
messages. If a user or automated system were tricked into processing a
specially-crafted message, GnuPG could consume resources, resulting in a
denial of service. (CVE-2013-4402)

Update instructions

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

Ubuntu 13.04

• gnupg2 - 2.0.19-2ubuntu1.1
• gnupg - 1.4.12-7ubuntu1.2

Ubuntu 12.10

• gnupg2 - 2.0.17-2ubuntu3.2
• gnupg - 1.4.11-3ubuntu4.3

Ubuntu 12.04

• gnupg2 - 2.0.17-2ubuntu2.12.04.3
• gnupg - 1.4.11-3ubuntu2.4

Ubuntu 10.04

• gnupg2 - 2.0.14-1ubuntu1.6
• gnupg - 1.4.10-2ubuntu1.4

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

References

• CVE-2013-4351
• CVE-2013-4402