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Red Hat Enterprise Linux 8: RHSA-2020-4479-01 Moderate Libxml2 Memory Flaws

red hat
Calendar Grey November 4, 2020
Dist Redhat Esm H88
Canonical has released a significant security patch for libxml2 that addresses memory vulnerabilities and resolves a potential infinite recursion problem.
An update for libxml2 is now available for Red Hat Enterprise Linux 8

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

The desktop must be restarted (log out, then log back in) for this update to take effect.

Summary

The libxml2 library is a development toolbox providing the implementation of various XML standards.
Security Fix(es):
* libxml2: memory leak in xmlParseBalancedChunkMemoryRecover in parser.c (CVE-2019-19956)
* libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c (CVE-2019-20388)
* libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations (CVE-2020-7595)
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 8.3 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat moderate severity memory leak infinite loop libxml2

References

https://access.redhat.com/security/cve/CVE-2019-19956 https://access.redhat.com/security/cve/CVE-2019-20388 https://access.redhat.com/security/cve/CVE-2020-7595 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
aarch64: libxml2-debuginfo-2.9.7-8.el8.aarch64.rpm libxml2-debugsource-2.9.7-8.el8.aarch64.rpm libxml2-devel-2.9.7-8.el8.aarch64.rpm python3-libxml2-debuginfo-2.9.7-8.el8.aarch64.rpm
ppc64le: libxml2-debuginfo-2.9.7-8.el8.ppc64le.rpm libxml2-debugsource-2.9.7-8.el8.ppc64le.rpm libxml2-devel-2.9.7-8.el8.ppc64le.rpm python3-libxml2-debuginfo-2.9.7-8.el8.ppc64le.rpm
s390x: libxml2-debuginfo-2.9.7-8.el8.s390x.rpm libxml2-debugsource-2.9.7-8.el8.s390x.rpm libxml2-devel-2.9.7-8.el8.s390x.rpm python3-libxml2-debuginfo-2.9.7-8.el8.s390x.rpm
x86_64: libxml2-debuginfo-2.9.7-8.el8.i686.rpm libxml2-debuginfo-2.9.7-8.el8.x86_64.rpm libxml2-debugsource-2.9.7-8.el8.i686.rpm libxml2-debugsource-2.9.7-8.el8.x86_64.rpm libxml2-devel-2.9.7-8.el8.i686.rpm libxml2-devel-2.9.7-8.el8.x86_64.rpm python3-libxml2-debuginfo-2.9.7-8.el8.i686.rpm python3-libxml2-debuginfo-2.9.7-8.el8.x86_64.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source: libxml2-2.9.7-8.el8.src.rpm
aarch64: libxml2-2.9.7-8.el8.aarch64.rpm libxml2-debuginfo-2.9.7-8.el8.aarch64.rpm libxml2-debugsource-2.9.7-8.el8.aarch64.rpm python3-libxml2-2.9.7-8.el8.aarch64.rpm python3-libxml2-debuginfo-2.9.7-8.el8.aarch64.rpm
ppc64le: libxml2-2.9.7-8.el8.ppc64le.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:4479-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4479
Issue date: 2020-11-03

Topic

An update for libxml2 is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat moderate severity memory leak infinite loop libxml2

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1788856 - CVE-2019-19956 libxml2: memory leak in xmlParseBalancedChunkMemoryRecover in parser.c

1799734 - CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c

1799786 - CVE-2020-7595 libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations

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