RHSA-2021:4373 - Security Advisory

Topic

An update for pcre is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Low. 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.

Description

PCRE is a Perl-compatible regular expression library.

Security Fix(es):

• pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1 (CVE-2019-20838)
• pcre: Integer overflow when parsing callout numeric arguments (CVE-2020-14155)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

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

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x

Fixes

• BZ - 1848436 - CVE-2020-14155 pcre: Integer overflow when parsing callout numeric arguments
• BZ - 1848444 - CVE-2019-20838 pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1

CVEs

• CVE-2019-20838
• CVE-2020-14155

References

• https://access.redhat.com/security/updates/classification/#low
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/