Linux Security
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    Ubuntu 4565-1: OpenConnect vulnerability

    Date 06 Oct 2020
    82
    Posted By LinuxSecurity Advisories
    OpenConnect could be made to crash if it received specially crafted input.
    ==========================================================================
    Ubuntu Security Notice USN-4565-1
    October 05, 2020
    
    openconnect vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    
    Summary:
    
    OpenConnect could be made to crash if it received specially crafted
    input.
    
    Software Description:
    - openconnect: An SSL VPN client
    
    Details:
    
    It was discovered that OpenConnect has a buffer overflow when a malicious
    server uses HTTP chunked encoding with crafted chunk sizes. An attacker
    could use it to provoke a denial of service (crash).
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      libopenconnect5                 7.08-3ubuntu0.18.04.2
      openconnect                     7.08-3ubuntu0.18.04.2
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4565-1
      CVE-2019-16239
    
    Package Information:
      https://launchpad.net/ubuntu/+source/openconnect/7.08-3ubuntu0.18.04.2
    

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