RHSA-2021:1032MediumCVSS 8.6

Red Hat Security Advisory: perl security update

Published
March 30, 2021
Last Modified
October 15, 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 products85

  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)
  • Red Hat Enterprise Linux Server EUS (v. 7.7)
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.ppc64le as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.src as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.src as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.x86_64 as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-4:5.16.3-294.el7_7.1.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-CPAN-0:1.9800-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-CPAN-0:1.9800-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-ExtUtils-CBuilder-1:0.28.2.6-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-ExtUtils-CBuilder-1:0.28.2.6-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-ExtUtils-Embed-0:1.30-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-ExtUtils-Embed-0:1.30-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-ExtUtils-Install-0:1.58-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-ExtUtils-Install-0:1.58-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-IO-Zlib-1:1.10-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-IO-Zlib-1:1.10-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-Locale-Maketext-Simple-1:0.21-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-Locale-Maketext-Simple-1:0.21-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-Module-CoreList-1:2.76.02-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-Module-CoreList-1:2.76.02-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-Module-Loaded-1:0.08-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-Module-Loaded-1:0.08-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-Object-Accessor-1:0.42-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • perl-Object-Accessor-1:0.42-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux Server EUS (v. 7.7)
  • perl-Package-Constants-1:0.02-294.el7_7.1.noarch as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • +55 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 (7)