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    Ubuntu 4543-1: Sanitize vulnerability

    Date
    105
    Posted By
    Sanitize could be made to perform XSS attacks if it received specially crafted input.
    ==========================================================================
    Ubuntu Security Notice USN-4543-1
    September 25, 2020
    
    ruby-sanitize vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    
    Summary:
    
    Sanitize could be made to perform XSS attacks if it received specially
    crafted input.
    
    Software Description:
    - ruby-sanitize: allowlist-based HTML and CSS sanitizer
    
    Details:
    
    Michał Bentkowski discovered that Sanitize did not properly sanitize some
    math or svg HTML under certain circumstances. A remote attacker could
    potentially exploit this to conduct cross-site scripting (XSS) attacks.
    (CVE-2020-4054)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.04 LTS:
      ruby-sanitize                   4.6.6-2.1~0.20.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4543-1
      CVE-2020-4054
    
    Package Information:
      https://launchpad.net/ubuntu/+source/ruby-sanitize/4.6.6-2.1~0.20.04.1
    
    
    

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