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Red Hat: RHSA-2020:3996-01 Moderate: Libxml2 Security and Bug Fix

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
A balanced update for Fedora's libxml2 resolves memory issues and infinite recursion problems, improving security across Unix-based systems.
An update for libxml2 is now available for Red Hat Enterprise Linux 7

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 7.9 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/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: libxml2-2.9.1-6.el7.5.src.rpm
x86_64: libxml2-2.9.1-6.el7.5.i686.rpm libxml2-2.9.1-6.el7.5.x86_64.rpm libxml2-debuginfo-2.9.1-6.el7.5.i686.rpm libxml2-debuginfo-2.9.1-6.el7.5.x86_64.rpm libxml2-python-2.9.1-6.el7.5.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libxml2-debuginfo-2.9.1-6.el7.5.i686.rpm libxml2-debuginfo-2.9.1-6.el7.5.x86_64.rpm libxml2-devel-2.9.1-6.el7.5.i686.rpm libxml2-devel-2.9.1-6.el7.5.x86_64.rpm libxml2-static-2.9.1-6.el7.5.i686.rpm libxml2-static-2.9.1-6.el7.5.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: libxml2-2.9.1-6.el7.5.src.rpm
x86_64: libxml2-2.9.1-6.el7.5.i686.rpm libxml2-2.9.1-6.el7.5.x86_64.rpm libxml2-debuginfo-2.9.1-6.el7.5.i686.rpm libxml2-debuginfo-2.9.1-6.el7.5.x86_64.rpm libxml2-python-2.9.1-6.el7.5.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: libxml2-debuginfo-2.9.1-6.el7.5.i686.rpm libxml2-debuginfo-2.9.1-6.el7.5.x86_64.rpm libxml2-devel-2.9.1-6.el7.5.i686.rpm libxml2-devel-2.9.1-6.el7.5.x86_64.rpm libxml2-static-2.9.1-6.el7.5.i686.rpm libxml2-static-2.9.1-6.el7.5.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: libxml2-2.9.1-6.el7.5.src.rpm
ppc64: libxml2-2.9.1-6.el7.5.ppc.rpm libxml2-2.9.1-6.el7.5.ppc64.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:3996-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3996
Issue date: 2020-09-29

Topic

An update for libxml2 is now available for Red Hat Enterprise Linux 7.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 Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - 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

1812145 - XSD validation fails on xsd:any

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