Linux Security
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    Ubuntu 4602-1: Perl vulnerabilities

    Date 26 Oct 2020
    126
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in Perl.
    ==========================================================================
    Ubuntu Security Notice USN-4602-1
    October 26, 2020
    
    perl vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in Perl.
    
    Software Description:
    - perl: Practical Extraction and Report Language
    
    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 20.04 LTS:
      perl                            5.30.0-9ubuntu0.2
    
    Ubuntu 18.04 LTS:
      perl                            5.26.1-6ubuntu0.5
    
    Ubuntu 16.04 LTS:
      perl                            5.22.1-9ubuntu0.9
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4602-1
      CVE-2020-10543, CVE-2020-10878, CVE-2020-12723
    
    Package Information:
      https://launchpad.net/ubuntu/+source/perl/5.30.0-9ubuntu0.2
      https://launchpad.net/ubuntu/+source/perl/5.26.1-6ubuntu0.5
      https://launchpad.net/ubuntu/+source/perl/5.22.1-9ubuntu0.9
    
    

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