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    Ubuntu 4602-2: Perl vulnerabilities

    Date
    113
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    Several security issues were fixed in Perl.
    ==========================================================================
    Ubuntu Security Notice USN-4602-2
    October 27, 2020
    
    perl vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in Perl.
    
    Software Description:
    - perl: Practical Extraction and Report Language
    
    Details:
    
    USN-4602-1 fixed several vulnerabilities in Perl. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    
    
    Original advisory details:
    
     ManhND discovered that Perl incorrectly handled certain regular
     expressions. In environments where untrusted regular expressions are
     evaluated, a remote attacker could possibly use this issue to cause Perl to
     crash, resulting in a denial of service, or possibly execute arbitrary
     code. (CVE-2020-10543)
    
     Hugo van der Sanden and Slaven Rezic discovered that Perl incorrectly
     handled certain regular expressions. In environments where untrusted
     regular expressions are evaluated, a remote attacker could possibly use
     this issue to cause Perl to crash, resulting in a denial of service, or
     possibly execute arbitrary code. (CVE-2020-10878)
    
     Sergey Aleynikov discovered that Perl incorrectly handled certain regular
     expressions. In environments where untrusted regular expressions are
     evaluated, a remote attacker could possibly use this issue to cause Perl to
     crash, resulting in a denial of service, or possibly execute arbitrary
     code. (CVE-2020-12723)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      perl                            5.18.2-2ubuntu1.7+esm3
    
    Ubuntu 12.04 ESM:
      perl                            5.14.2-6ubuntu2.11
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4602-2
      https://usn.ubuntu.com/4602-1
      CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
    

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