Ubuntu 3817-1: Python vulnerabilities

    Date13 Nov 2018
    1114
    Posted ByAnthony Pell
    Several security issues were fixed in Python.
    ==========================================================================
    Ubuntu Security Notice USN-3817-1
    November 13, 2018
    
    python2.7, python3.4, python3.5 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in Python.
    
    Software Description:
    - python2.7: An interactive high-level object-oriented language
    - python3.5: An interactive high-level object-oriented language
    - python3.4: An interactive high-level object-oriented language
    
    Details:
    
    It was discovered that Python incorrectly handled large amounts of data. A
    remote attacker could use this issue to cause Python to crash, resulting in
    a denial of service, or possibly execute arbitrary code. This issue only
    affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1000030)
    
    It was discovered that Python incorrectly handled running external commands
    in the shutil module. A remote attacker could use this issue to cause
    Python to crash, resulting in a denial of service, or possibly execute
    arbitrary code. (CVE-2018-1000802)
    
    It was discovered that Python incorrectly used regular expressions
    vulnerable to catastrophic backtracking. A remote attacker could possibly
    use this issue to cause a denial of service. This issue only affected
    Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1060, CVE-2018-1061)
    
    It was discovered that Python failed to initialize Expat's hash salt. A
    remote attacker could possibly use this issue to cause hash collisions,
    leading to a denial of service. (CVE-2018-14647)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      python2.7                       2.7.15~rc1-1ubuntu0.1
      python2.7-minimal               2.7.15~rc1-1ubuntu0.1
    
    Ubuntu 16.04 LTS:
      python2.7                       2.7.12-1ubuntu0~16.04.4
      python2.7-minimal               2.7.12-1ubuntu0~16.04.4
      python3.5                       3.5.2-2ubuntu0~16.04.5
      python3.5-minimal               3.5.2-2ubuntu0~16.04.5
    
    Ubuntu 14.04 LTS:
      python2.7                       2.7.6-8ubuntu0.5
      python2.7-minimal               2.7.6-8ubuntu0.5
      python3.4                       3.4.3-1ubuntu1~14.04.7
      python3.4-minimal               3.4.3-1ubuntu1~14.04.7
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3817-1
      CVE-2018-1000030, CVE-2018-1000802, CVE-2018-1060, CVE-2018-1061,
      CVE-2018-14647
    
    Package Information:
      https://launchpad.net/ubuntu/+source/python2.7/2.7.15~rc1-1ubuntu0.1
      https://launchpad.net/ubuntu/+source/python2.7/2.7.12-1ubuntu0~16.04.4
      https://launchpad.net/ubuntu/+source/python3.5/3.5.2-2ubuntu0~16.04.5
      https://launchpad.net/ubuntu/+source/python2.7/2.7.6-8ubuntu0.5
      https://launchpad.net/ubuntu/+source/python3.4/3.4.3-1ubuntu1~14.04.7
    
    

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