Ubuntu 4378-1: Flask vulnerability

    Date 01 Jun 2020
    140
    Posted By LinuxSecurity Advisories
    Flask could be made to consume a large amount of memory if it received a specially crafted input.
    ==========================================================================
    Ubuntu Security Notice USN-4378-1
    June 01, 2020
    
    flask vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 ESM
    
    Summary:
    
    Flask could be made to consume a large amount of memory if it
    received a specially crafted input.
    
    Software Description:
    - flask: Micro web framework based on Werkzeug and Jinja2
    
    Details:
    
    It was discovered that Flask incorrectly handled certain inputs.
    An attacker could possibly use this issue to cause a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      python-flask                    0.12.2-3ubuntu0.1
      python3-flask                   0.12.2-3ubuntu0.1
    
    Ubuntu 16.04 LTS:
      python-flask                    0.10.1-2ubuntu0.1
      python3-flask                   0.10.1-2ubuntu0.1
    
    Ubuntu 14.04 ESM:
      python-flask                    0.10.1-2ubuntu0.1~esm1
      python3-flask                   0.10.1-2ubuntu0.1~esm1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4378-1
      CVE-2018-1000656
    
    Package Information:
      https://launchpad.net/ubuntu/+source/flask/0.12.2-3ubuntu0.1
      https://launchpad.net/ubuntu/+source/flask/0.10.1-2ubuntu0.1
    

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