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    Ubuntu 4613-1: python-cryptography vulnerability

    Date 03 Nov 2020
    400
    Posted By LinuxSecurity Advisories
    python-cryptography could be made to expose sensitive information over the network.
    ==========================================================================
    Ubuntu Security Notice USN-4613-1
    November 03, 2020
    
    python-cryptography vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.10
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    python-cryptography could be made to expose sensitive information over the
    network.
    
    Software Description:
    - python-cryptography: Cryptography Python library
    
    Details:
    
    Hubert Kario discovered that python-cryptography incorrectly handled certain decryption.
    An attacker could possibly use this issue to expose sensitive information.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.10:
      python3-cryptography            3.0-1ubuntu0.1
    
    Ubuntu 20.04 LTS:
      python-cryptography             2.8-3ubuntu0.1
      python3-cryptography            2.8-3ubuntu0.1
    
    Ubuntu 18.04 LTS:
      python-cryptography             2.1.4-1ubuntu1.4
      python3-cryptography            2.1.4-1ubuntu1.4
    
    Ubuntu 16.04 LTS:
      python-cryptography             1.2.3-1ubuntu0.3
      python3-cryptography            1.2.3-1ubuntu0.3
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4613-1
      CVE-2020-25659
    
    Package Information:
      https://launchpad.net/ubuntu/+source/python-cryptography/3.0-1ubuntu0.1
      https://launchpad.net/ubuntu/+source/python-cryptography/2.8-3ubuntu0.1
      https://launchpad.net/ubuntu/+source/python-cryptography/2.1.4-1ubuntu1.4
      https://launchpad.net/ubuntu/+source/python-cryptography/1.2.3-1ubuntu0.3
    

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