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Red Hat: RHSA-2021-1898-01 Moderate: Python-Lxml mXSS Threat

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
Red Hat has released an important security patch for python-lxml to counter mXSS vulnerabilities. Ensure that you implement these updates swiftly to maintain security.
An update for python-lxml 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

Summary

lxml is an XML processing library providing access to libxml2 and libxslt libraries using the Python ElementTree API.
Security Fix(es):
* python-lxml: mXSS due to the use of improper parser (CVE-2020-27783)
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 8.4 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat moderate severity security impact python-lxml mXSS

References

https://access.redhat.com/security/cve/CVE-2020-27783 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: python-lxml-4.2.3-2.el8.src.rpm
aarch64: python-lxml-debugsource-4.2.3-2.el8.aarch64.rpm python3-lxml-4.2.3-2.el8.aarch64.rpm python3-lxml-debuginfo-4.2.3-2.el8.aarch64.rpm
ppc64le: python-lxml-debugsource-4.2.3-2.el8.ppc64le.rpm python3-lxml-4.2.3-2.el8.ppc64le.rpm python3-lxml-debuginfo-4.2.3-2.el8.ppc64le.rpm
s390x: python-lxml-debugsource-4.2.3-2.el8.s390x.rpm python3-lxml-4.2.3-2.el8.s390x.rpm python3-lxml-debuginfo-4.2.3-2.el8.s390x.rpm
x86_64: python-lxml-debugsource-4.2.3-2.el8.x86_64.rpm python3-lxml-4.2.3-2.el8.x86_64.rpm python3-lxml-debuginfo-4.2.3-2.el8.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/


Advisory ID: RHSA-2021:1898-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1898
Issue date: 2021-05-18

Topic

An update for python-lxml 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 security impact python-lxml mXSS

Relevant Releases Architectures

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

Bugs Fixed

1901633 - CVE-2020-27783 python-lxml: mXSS due to the use of improper parser

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