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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: perl security update
Advisory ID:       RHSA-2021:1266-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1266
Issue date:        2021-04-20
CVE Names:         CVE-2020-10543 CVE-2020-10878 CVE-2020-12723 
=====================================================================

1. Summary:

An update for perl is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP
Solutions.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

3. Description:

Perl is a high-level programming language that is commonly used for system
administration utilities and web programming.

Security Fix(es):

* perl: heap-based buffer overflow in regular expression compiler leads to
DoS (CVE-2020-10543)

* perl: corruption of intermediate language state of compiled regular
expression due to integer overflow leads to DoS (CVE-2020-10878)

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

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1837975 - CVE-2020-10543 perl: heap-based buffer overflow in regular expression compiler leads to DoS
1837988 - CVE-2020-10878 perl: corruption of intermediate language state of compiled regular expression due to integer overflow leads to DoS
1838000 - CVE-2020-12723 perl: corruption of intermediate language state of compiled regular expression due to recursive S_study_chunk() calls leads to DoS
1938673 - perl-5.26.3-416.el8 FTBFS: ../cpan/Time-Local/t/Local.t test fails in year 2020 [rhel-7.4.z]

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
perl-5.16.3-292.el7_4.2.src.rpm

noarch:
perl-CPAN-1.9800-292.el7_4.2.noarch.rpm
perl-ExtUtils-CBuilder-0.28.2.6-292.el7_4.2.noarch.rpm
perl-ExtUtils-Embed-1.30-292.el7_4.2.noarch.rpm
perl-ExtUtils-Install-1.58-292.el7_4.2.noarch.rpm
perl-IO-Zlib-1.10-292.el7_4.2.noarch.rpm
perl-Locale-Maketext-Simple-0.21-292.el7_4.2.noarch.rpm
perl-Module-CoreList-2.76.02-292.el7_4.2.noarch.rpm
perl-Module-Loaded-0.08-292.el7_4.2.noarch.rpm
perl-Object-Accessor-0.42-292.el7_4.2.noarch.rpm
perl-Package-Constants-0.02-292.el7_4.2.noarch.rpm
perl-Pod-Escapes-1.04-292.el7_4.2.noarch.rpm

x86_64:
perl-5.16.3-292.el7_4.2.x86_64.rpm
perl-Time-Piece-1.20.1-292.el7_4.2.x86_64.rpm
perl-core-5.16.3-292.el7_4.2.x86_64.rpm
perl-debuginfo-5.16.3-292.el7_4.2.i686.rpm
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-devel-5.16.3-292.el7_4.2.i686.rpm
perl-devel-5.16.3-292.el7_4.2.x86_64.rpm
perl-libs-5.16.3-292.el7_4.2.i686.rpm
perl-libs-5.16.3-292.el7_4.2.x86_64.rpm
perl-macros-5.16.3-292.el7_4.2.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
perl-5.16.3-292.el7_4.2.src.rpm

noarch:
perl-CPAN-1.9800-292.el7_4.2.noarch.rpm
perl-ExtUtils-CBuilder-0.28.2.6-292.el7_4.2.noarch.rpm
perl-ExtUtils-Embed-1.30-292.el7_4.2.noarch.rpm
perl-ExtUtils-Install-1.58-292.el7_4.2.noarch.rpm
perl-IO-Zlib-1.10-292.el7_4.2.noarch.rpm
perl-Locale-Maketext-Simple-0.21-292.el7_4.2.noarch.rpm
perl-Module-CoreList-2.76.02-292.el7_4.2.noarch.rpm
perl-Module-Loaded-0.08-292.el7_4.2.noarch.rpm
perl-Object-Accessor-0.42-292.el7_4.2.noarch.rpm
perl-Package-Constants-0.02-292.el7_4.2.noarch.rpm
perl-Pod-Escapes-1.04-292.el7_4.2.noarch.rpm

ppc64le:
perl-5.16.3-292.el7_4.2.ppc64le.rpm
perl-Time-Piece-1.20.1-292.el7_4.2.ppc64le.rpm
perl-core-5.16.3-292.el7_4.2.ppc64le.rpm
perl-debuginfo-5.16.3-292.el7_4.2.ppc64le.rpm
perl-devel-5.16.3-292.el7_4.2.ppc64le.rpm
perl-libs-5.16.3-292.el7_4.2.ppc64le.rpm
perl-macros-5.16.3-292.el7_4.2.ppc64le.rpm

x86_64:
perl-5.16.3-292.el7_4.2.x86_64.rpm
perl-Time-Piece-1.20.1-292.el7_4.2.x86_64.rpm
perl-core-5.16.3-292.el7_4.2.x86_64.rpm
perl-debuginfo-5.16.3-292.el7_4.2.i686.rpm
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-devel-5.16.3-292.el7_4.2.i686.rpm
perl-devel-5.16.3-292.el7_4.2.x86_64.rpm
perl-libs-5.16.3-292.el7_4.2.i686.rpm
perl-libs-5.16.3-292.el7_4.2.x86_64.rpm
perl-macros-5.16.3-292.el7_4.2.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.4):

Source:
perl-5.16.3-292.el7_4.2.src.rpm

noarch:
perl-CPAN-1.9800-292.el7_4.2.noarch.rpm
perl-ExtUtils-CBuilder-0.28.2.6-292.el7_4.2.noarch.rpm
perl-ExtUtils-Embed-1.30-292.el7_4.2.noarch.rpm
perl-ExtUtils-Install-1.58-292.el7_4.2.noarch.rpm
perl-IO-Zlib-1.10-292.el7_4.2.noarch.rpm
perl-Locale-Maketext-Simple-0.21-292.el7_4.2.noarch.rpm
perl-Module-CoreList-2.76.02-292.el7_4.2.noarch.rpm
perl-Module-Loaded-0.08-292.el7_4.2.noarch.rpm
perl-Object-Accessor-0.42-292.el7_4.2.noarch.rpm
perl-Package-Constants-0.02-292.el7_4.2.noarch.rpm
perl-Pod-Escapes-1.04-292.el7_4.2.noarch.rpm

x86_64:
perl-5.16.3-292.el7_4.2.x86_64.rpm
perl-Time-Piece-1.20.1-292.el7_4.2.x86_64.rpm
perl-core-5.16.3-292.el7_4.2.x86_64.rpm
perl-debuginfo-5.16.3-292.el7_4.2.i686.rpm
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-devel-5.16.3-292.el7_4.2.i686.rpm
perl-devel-5.16.3-292.el7_4.2.x86_64.rpm
perl-libs-5.16.3-292.el7_4.2.i686.rpm
perl-libs-5.16.3-292.el7_4.2.x86_64.rpm
perl-macros-5.16.3-292.el7_4.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-tests-5.16.3-292.el7_4.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

ppc64le:
perl-debuginfo-5.16.3-292.el7_4.2.ppc64le.rpm
perl-tests-5.16.3-292.el7_4.2.ppc64le.rpm

x86_64:
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-tests-5.16.3-292.el7_4.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

x86_64:
perl-debuginfo-5.16.3-292.el7_4.2.x86_64.rpm
perl-tests-5.16.3-292.el7_4.2.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2020-10543
https://access.redhat.com/security/cve/CVE-2020-10878
https://access.redhat.com/security/cve/CVE-2020-12723
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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