Linux Security
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    Ubuntu 4247-1: python-apt vulnerabilities

    Date 22 Jan 2020
    351
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in python-apt.
    ==========================================================================
    Ubuntu Security Notice USN-4247-1
    January 22, 2020
    
    python-apt vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 19.04
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in python-apt.
    
    Software Description:
    - python-apt: Python interface to libapt-pkg
    
    Details:
    
    It was discovered that python-apt would still use MD5 hashes to validate
    certain downloaded packages. If a remote attacker were able to perform a
    man-in-the-middle attack, this flaw could potentially be used to install
    altered packages. (CVE-2019-15795)
    
    It was discovered that python-apt could install packages from untrusted
    repositories, contrary to expectations. (CVE-2019-15796)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      python-apt                      1.9.0ubuntu1.2
      python3-apt                     1.9.0ubuntu1.2
    
    Ubuntu 19.04:
      python-apt                      1.8.5~ubuntu0.2
      python3-apt                     1.8.5~ubuntu0.2
    
    Ubuntu 18.04 LTS:
      python-apt                      1.6.5ubuntu0.1
      python3-apt                     1.6.5ubuntu0.1
    
    Ubuntu 16.04 LTS:
      python-apt                      1.1.0~beta1ubuntu0.16.04.7
      python3-apt                     1.1.0~beta1ubuntu0.16.04.7
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4247-1
      CVE-2019-15795, CVE-2019-15796
    
    Package Information:
      https://launchpad.net/ubuntu/+source/python-apt/1.9.0ubuntu1.2
      https://launchpad.net/ubuntu/+source/python-apt/1.8.5~ubuntu0.2
      https://launchpad.net/ubuntu/+source/python-apt/1.6.5ubuntu0.1
      https://launchpad.net/ubuntu/+source/python-apt/1.1.0~beta1ubuntu0.16.04.7
    
    

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