- -------------------------------------------------------------------------
Debian Security Advisory DSA-4892-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
April 18, 2021                        https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : python-bleach
CVE ID         : CVE-2021-23980
Debian Bug     : 986251

It was reported that python-bleach, a whitelist-based HTML-sanitizing
library, is prone to a mutation XSS vulnerability in bleach.clean when
'svg' or 'math' are in the allowed tags, 'p' or 'br' are in allowed
tags, 'style', 'title', 'noscript', 'script', 'textarea', 'noframes',
'iframe', or 'xmp' are in allowed tags and 'strip_comments=False' is
set.

For the stable distribution (buster), this problem has been fixed in
version 3.1.2-0+deb10u2.

We recommend that you upgrade your python-bleach packages.

For the detailed security status of python-bleach please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-bleach

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-4892-1: python-bleach security update

April 18, 2021
It was reported that python-bleach, a whitelist-based HTML-sanitizing library, is prone to a mutation XSS vulnerability in bleach.clean when 'svg' or 'math' are in the allowed tags...

Summary

For the stable distribution (buster), this problem has been fixed in
version 3.1.2-0+deb10u2.

We recommend that you upgrade your python-bleach packages.

For the detailed security status of python-bleach please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-bleach

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
It was reported that python-bleach, a whitelist-based HTML-sanitizing
library, is prone to a mutation XSS vulnerability in bleach.clean when
'svg' or 'math' are in the allowed tags, 'p' or 'br' are in allowed
tags, 'style', 'title', 'noscript', 'script', 'textarea', 'noframes',
'iframe', or 'xmp' are in allowed tags and 'strip_comments=False' is
set.

Related News

24.Key Code Esm H320
2 - 3 min read
The Akira ransomware group has extorted approximately $42 million from over 250 victims since January 1, 2024. The group initially focused on
5.ShakingHands Esm H320
2 - 3 min read
At The Linux Foundation's Open Source Summit North America , Linus Torvalds, the creator of Linux, discussed various topics related to Linux
30.Lock Globe Motherboard Esm H320
1 - 2 min read
The SPDX 3.0 release marks a significant milestone in software management, particularly for Linux admins, infosec professionals, internet security
11.Locks IsometricPattern Esm H320
2 - 3 min read
Open Source maintainers and developers have been warned about the continued wave of attacks aimed at project maintainers similar to those recently
28.Lock Globe Esm H320
1 - 2 min read
A resurgence of cyberattacks targeting Linux systems in Asian campaigns through the utilization of the Pupy Remote Access Trojan (RAT) has been
27.Tablet Connections Blocks Lock Esm H320
2 - 4 min read
Canonical has recently announced the Beta release of Ubuntu Linux 24.04 LTS , codenamed "Noble Numbat." This release aims to continue Ubuntu's
21.Globe RadiatingCode Esm H320
2 - 3 min read
The open-source movement has come a long way, from its origins in the 1960s and 1970s to becoming an integral part of organizations worldwide.
13.Lock StylizedMotherboard Esm H320
2 - 3 min read
The Rust-based Edera project demonstrates a unique approach to container security that addresses cloud-native computing challenges. Let's examine
Sign Up