Linux Security
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    Ubuntu 4569-1: Yaws vulnerabilities

    Date 05 Oct 2020
    101
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in Yaws.
    ==========================================================================
    Ubuntu Security Notice USN-4569-1
    October 05, 2020
    
    yaws vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    
    Summary:
    
    Several security issues were fixed in Yaws.
    
    Software Description:
    - yaws: High performance HTTP 1.1 webserver written in Erlang
    
    Details:
    
    It was discovered that Yaws did not properly sanitize XML input. A remote
    attacker could use this vulnerability to execute an XML External Entity
    (XXE) injection attack. (CVE-2020-24379)
    
    It was discovered that Yaws mishandled certain input when running CGI
    scripts. A remote attacker could use this vulnerability to execute
    arbitrary commands. (CVE-2020-24916)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      erlang-yapp                     2.0.4+dfsg-2ubuntu0.1
      erlang-yaws                     2.0.4+dfsg-2ubuntu0.1
      yaws                            2.0.4+dfsg-2ubuntu0.1
      yaws-mail                       2.0.4+dfsg-2ubuntu0.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4569-1
      CVE-2020-24379, CVE-2020-24916
    
    Package Information:
      https://launchpad.net/ubuntu/+source/yaws/2.0.4+dfsg-2ubuntu0.1
    
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