RHSA-2021:0557MediumCVSS 7.5

Red Hat Security Advisory: perl security update

Published
February 16, 2021
Last Modified
October 14, 2026

🔗 CVE IDs covered (1)

CVE-2020-12723 →

📋 Description

CVE-2020-12723 — perl: corruption of intermediate language state of compiled regular expression due to recursive S_study_chunk() calls leads to DoS

🎯 Affected products131

  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-4:5.26.3-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-4:5.26.3-417.el8_3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-4:5.26.3-417.el8_3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-4:5.26.3-417.el8_3.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-4:5.26.3-417.el8_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Attribute-Handlers-0:0.99-417.el8_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-0:1.26-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-0:1.26-417.el8_3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-0:1.26-417.el8_3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-0:1.26-417.el8_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Devel-Peek-debuginfo-0:1.26-417.el8_3.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Devel-SelfStubber-0:1.06-417.el8_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-Errno-0:1.28-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Errno-0:1.28-417.el8_3.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Errno-0:1.28-417.el8_3.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-Errno-0:1.28-417.el8_3.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • perl-ExtUtils-Embed-0:1.34-417.el8_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-ExtUtils-Miniperl-0:1.06-417.el8_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • perl-IO-0:1.38-417.el8_3.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • +101 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 (4)