RHSA-2021:0343MediumCVSS 8.6

Red Hat Security Advisory: perl security update

Published
February 2, 2021
Last Modified
October 14, 2026

🔗 CVE IDs covered (3)

CVE-2020-10543 →CVE-2020-10878 →CVE-2020-12723 →

📋 Description

CVE-2020-10543 — perl: heap-based buffer overflow in regular expression compiler leads to DoS CVE-2020-10878 — perl: corruption of intermediate language state of compiled regular expression due to integer overflow leads to DoS CVE-2020-12723 — perl: corruption of intermediate language state of compiled regular expression due to recursive S_study_chunk() calls leads to DoS

🎯 Affected products114

  • Red Hat Enterprise Linux Client (v. 7)
  • Red Hat Enterprise Linux Client Optional (v. 7)
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7)
  • Red Hat Enterprise Linux Server (v. 7)
  • Red Hat Enterprise Linux Server Optional (v. 7)
  • Red Hat Enterprise Linux Workstation (v. 7)
  • Red Hat Enterprise Linux Workstation Optional (v. 7)
  • perl-4:5.16.3-299.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-4:5.16.3-299.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-4:5.16.3-299.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-4:5.16.3-299.el7_9.src as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-4:5.16.3-299.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-4:5.16.3-299.el7_9.src as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-4:5.16.3-299.el7_9.x86_64 as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-4:5.16.3-299.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-4:5.16.3-299.el7_9.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-CPAN-0:1.9800-299.el7_9.noarch as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-CPAN-0:1.9800-299.el7_9.noarch as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-CPAN-0:1.9800-299.el7_9.noarch as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-ExtUtils-CBuilder-1:0.28.2.6-299.el7_9.noarch as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-ExtUtils-CBuilder-1:0.28.2.6-299.el7_9.noarch as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-ExtUtils-CBuilder-1:0.28.2.6-299.el7_9.noarch as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-ExtUtils-Embed-0:1.30-299.el7_9.noarch as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-ExtUtils-Embed-0:1.30-299.el7_9.noarch as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-ExtUtils-Embed-0:1.30-299.el7_9.noarch as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-ExtUtils-Install-0:1.58-299.el7_9.noarch as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-ExtUtils-Install-0:1.58-299.el7_9.noarch as a component of Red Hat Enterprise Linux Server (v. 7)
  • perl-ExtUtils-Install-0:1.58-299.el7_9.noarch as a component of Red Hat Enterprise Linux Workstation (v. 7)
  • perl-IO-Zlib-1:1.10-299.el7_9.noarch as a component of Red Hat Enterprise Linux Client (v. 7)
  • perl-IO-Zlib-1:1.10-299.el7_9.noarch as a component of Red Hat Enterprise Linux Server (v. 7)
  • +84 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To mitigate this flaw, developers should not allow untrusted regular expressions to be compiled by the Perl regular expression compiler.

🔗 References (6)