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    Ubuntu 4447-1: libssh vulnerability

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    libssh could be made to crash if it received a specially crafted request.
    ==========================================================================
    Ubuntu Security Notice USN-4447-1
    August 04, 2020
    
    libssh vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    libssh could be made to crash if it received a specially crafted request.
    
    Software Description:
    - libssh: None
    
    Details:
    
    It was discovered that libssh incorrectly handled certain requests.
    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 20.04 LTS:
      libssh-4                        0.9.3-2ubuntu2.1
    
    Ubuntu 18.04 LTS:
      libssh-4                        0.8.0~20170825.94fa1e38-1ubuntu0.7
    
    Ubuntu 16.04 LTS:
      libssh-4                        0.6.3-4.3ubuntu0.6
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4447-1
      CVE-2020-16135
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libssh/0.9.3-2ubuntu2.1
      https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.7
      https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.6
    

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