Ubuntu: 2059-1: GnuPG vulnerability
Posted by Benjamin D. Thomas   
Ubuntu GnuPG could expose sensitive information when performing decryption.
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Ubuntu Security Notice USN-2059-1
December 18, 2013

gnupg vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.10
- Ubuntu 13.04
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

GnuPG could expose sensitive information when performing decryption.

Software Description:
- gnupg: GNU privacy guard - a free PGP replacement

Details:

Daniel Genkin, Adi Shamir, and Eran Tromer discovered that GnuPG was
susceptible to an adaptive chosen ciphertext attack via acoustic
emanations. A local attacker could use this attack to possibly recover
private keys.

Update instructions:

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

Ubuntu 13.10:
  gnupg                           1.4.14-1ubuntu2.1

Ubuntu 13.04:
  gnupg                           1.4.12-7ubuntu1.3

Ubuntu 12.10:
  gnupg                           1.4.11-3ubuntu4.4

Ubuntu 12.04 LTS:
  gnupg                           1.4.11-3ubuntu2.5

Ubuntu 10.04 LTS:
  gnupg                           1.4.10-2ubuntu1.5

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

References:
  http://www.ubuntu.com/usn/usn-2059-1
  CVE-2013-4576

Package Information:
  https://launchpad.net/ubuntu/+source/gnupg/1.4.14-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/gnupg/1.4.12-7ubuntu1.3
  https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu4.4
  https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu2.5
  https://launchpad.net/ubuntu/+source/gnupg/1.4.10-2ubuntu1.5