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    Ubuntu 4245-1: PySAML2 vulnerability

    Date 21 Jan 2020
    Posted By LinuxSecurity Advisories
    PySAML2 could be made to bypass signature verification with arbitrary data.
    Ubuntu Security Notice USN-4245-1
    January 21, 2020
    python-pysaml2 vulnerability
    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
    PySAML2 could be made to bypass signature verification with arbitrary data.
    Software Description:
    - python-pysaml2: Pure python implementation of SAML2
    It was discovered that PySAML2 incorrectly handled certain SAML files.
    An attacker could possibly use this issue to bypass signature verification
    with arbitrary data.
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 19.10:
      python-pysaml2                  4.5.0+dfsg1-0ubuntu2.19.10.1
      python3-pysaml2                 4.5.0+dfsg1-0ubuntu2.19.10.1
    Ubuntu 19.04:
      python-pysaml2                  4.5.0+dfsg1-0ubuntu2.19.04.1
      python3-pysaml2                 4.5.0+dfsg1-0ubuntu2.19.04.1
    Ubuntu 18.04 LTS:
      python-pysaml2                  4.0.2-0ubuntu3.1
      python3-pysaml2                 4.0.2-0ubuntu3.1
    Ubuntu 16.04 LTS:
      python-pysaml2                  3.0.0-3ubuntu1.16.04.4
      python3-pysaml2                 3.0.0-3ubuntu1.16.04.4
    In general, a standard system update will make all the necessary changes.
    Package Information:

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