Ubuntu 1477-1: APT vulnerability

    Date15 Jun 2012
    CategoryUbuntu
    38
    Posted ByLinuxSecurity Advisories
    An attacker could trick APT into installing altered packages.
    ==========================================================================
    Ubuntu Security Notice USN-1477-1
    June 15, 2012
    
    apt vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    - Ubuntu 11.10
    - Ubuntu 11.04
    - Ubuntu 10.04 LTS
    - Ubuntu 8.04 LTS
    
    Summary:
    
    An attacker could trick APT into installing altered packages.
    
    Software Description:
    - apt: Advanced front-end for dpkg
    
    Details:
    
    Georgi Guninski discovered that APT did not properly validate imported
    keyrings via apt-key net-update. USN-1475-1 added additional verification
    for imported keyrings, but it was insufficient. If a remote attacker were
    able to perform a man-in-the-middle attack, this flaw could potentially be
    used to install altered packages. This update corrects the issue by
    disabling the net-update option completely. A future update will re-enable
    the option with corrected verification.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      apt                             0.8.16~exp12ubuntu10.2
    
    Ubuntu 11.10:
      apt                             0.8.16~exp5ubuntu13.5
    
    Ubuntu 11.04:
      apt                             0.8.13.2ubuntu4.6
    
    Ubuntu 10.04 LTS:
      apt                             0.7.25.3ubuntu9.13
    
    Ubuntu 8.04 LTS:
      apt                             0.7.9ubuntu17.6
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1477-1
      CVE-2012-0954
    
    Package Information:
      https://launchpad.net/ubuntu/+source/apt/0.8.16~exp12ubuntu10.2
      https://launchpad.net/ubuntu/+source/apt/0.8.16~exp5ubuntu13.5
      https://launchpad.net/ubuntu/+source/apt/0.8.13.2ubuntu4.6
      https://launchpad.net/ubuntu/+source/apt/0.7.25.3ubuntu9.13
      https://launchpad.net/ubuntu/+source/apt/0.7.9ubuntu17.6
    
    
    
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