============================================================================
Ubuntu Security Notice USN-2554-1
April 01, 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 B=C3=B6ck 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:
  gnupg                           1.4.16-1.2ubuntu1.2
  gnupg2                          2.0.24-1ubuntu2.2

Ubuntu 14.04 LTS:
  gnupg                           1.4.16-1ubuntu2.3
  gnupg2                          2.0.22-3ubuntu1.3

Ubuntu 12.04 LTS:
  gnupg                           1.4.11-3ubuntu2.9
  gnupg2                          2.0.17-2ubuntu2.12.04.6

Ubuntu 10.04 LTS:
  gnupg                           1.4.10-2ubuntu1.8

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

References:
  http://www.ubuntu.com/usn/usn-2554-1
  CVE-2014-3591, CVE-2014-5270, CVE-2015-0837, CVE-2015-1606,
  CVE-2015-1607

Package Information:
  https://launchpad.net/ubuntu/+source/gnupg/1.4.16-1.2ubuntu1.2
  https://launchpad.net/ubuntu/+source/gnupg2/2.0.24-1ubuntu2.2
  https://launchpad.net/ubuntu/+source/gnupg/1.4.16-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/gnupg2/2.0.22-3ubuntu1.3
  https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu2.9
  https://launchpad.net/ubuntu/+source/gnupg2/2.0.17-2ubuntu2.12.04.6
  https://launchpad.net/ubuntu/+source/gnupg/1.4.10-2ubuntu1.8