=========================================================================Ubuntu Security Notice USN-2348-1
September 16, 2014

apt vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in APT.

Software Description:
- apt: Advanced front-end for dpkg

Details:

It was discovered that APT did not re-verify downloaded files when the
If-Modified-Since wasn't met. (CVE-2014-0487)

It was discovered that APT did not invalidate repository data when it
switched from an unauthenticated to an authenticated state. (CVE-2014-0488)

It was discovered that the APT Acquire::GzipIndexes option caused APT to
skip checksum validation. This issue only applied to Ubuntu 12.04 LTS and
Ubuntu 14.04 LTS, and was not enabled by default. (CVE-2014-0489)

It was discovered that APT did not correctly validate signatures when
downloading source packages using the download command. This issue only
applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-0490)

Update instructions:

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

Ubuntu 14.04 LTS:
  apt                             1.0.1ubuntu2.3

Ubuntu 12.04 LTS:
  apt                             0.8.16~exp12ubuntu10.19

Ubuntu 10.04 LTS:
  apt                             0.7.25.3ubuntu9.16

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

References:
  https://ubuntu.com/security/notices/USN-2348-1
  CVE-2014-0487, CVE-2014-0488, CVE-2014-0489, CVE-2014-0490

Package Information:
  https://launchpad.net/ubuntu/+source/apt/1.0.1ubuntu2.3
  https://launchpad.net/ubuntu/+source/apt/0.8.16~exp12ubuntu10.19
  https://launchpad.net/ubuntu/+source/apt/0.7.25.3ubuntu9.16