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Test ID:1.3.6.1.4.1.25623.1.1.10.2021.0246
Category:Mageia Linux Local Security Checks
Title:Mageia: Security Advisory (MGASA-2021-0246)
Summary:The remote host is missing an update for the 'python-lxml' package(s) announced via the MGASA-2021-0246 advisory.
Description:Summary:
The remote host is missing an update for the 'python-lxml' package(s) announced via the MGASA-2021-0246 advisory.

Vulnerability Insight:
An XSS vulnerability was discovered in python-lxml's clean module
versions before 4.6.3. When disabling the safe_attrs_only and forms
arguments, the Cleaner class does not remove the formaction attribute
allowing for JS to bypass the sanitizer. A remote attacker could exploit this
flaw to run arbitrary JS code on users who interact with incorrectly
sanitized HTML (CVE-2021-28957).

Affected Software/OS:
'python-lxml' package(s) on Mageia 7, Mageia 8.

Solution:
Please install the updated package(s).

CVSS Score:
4.3

CVSS Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2021-28957
https://security.netapp.com/advisory/ntap-20210521-0004/
Debian Security Information: DSA-4880 (Google Search)
https://www.debian.org/security/2021/dsa-4880
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/
https://security.gentoo.org/glsa/202208-06
https://bugs.launchpad.net/lxml/+bug/1888153
https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999
https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270
https://www.oracle.com/security-alerts/cpuoct2021.html
https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html
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