Ubuntu 4327-1: libssh vulnerability

    Date09 Apr 2020
    137
    Posted ByLinuxSecurity Advisories
    libssh could be made to crash if it received specially crafted network traffic.
    ==========================================================================
    Ubuntu Security Notice USN-4327-1
    April 09, 2020
    
    libssh vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 18.04 LTS
    
    Summary:
    
    libssh could be made to crash if it received specially crafted network
    traffic.
    
    Software Description:
    - libssh: A tiny C SSH library
    
    Details:
    
    Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A
    remote attacker could possibly use this issue to cause libssh to crash,
    resulting in a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      libssh-4                        0.9.0-1ubuntu1.4
    
    Ubuntu 18.04 LTS:
      libssh-4                        0.8.0~20170825.94fa1e38-1ubuntu0.6
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4327-1
      CVE-2020-1730
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libssh/0.9.0-1ubuntu1.4
      https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.6
    
    

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