OPENSUSE-SU-2021:0571-1

Vulnerability from csaf_opensuse - Published: 2021-04-17 22:05 - Updated: 2026-09-20 19:23
Summary
Security update for python-bleach
Severity
Important
Notes
Title of the patch: Security update for python-bleach
Description of the patch: This update for python-bleach fixes the following issues: - CVE-2021-23980: Fixed mutation XSS on bleach.clean with specific combinations of allowed tags (boo#1184547) Update to 3.1.5: * replace missing ``setuptools`` dependency with ``packaging``. Thank you Benjamin Peterson. Update to 3.1.4 (boo#1168280, CVE-2020-6817): * ``bleach.clean`` behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to ``bleach.clean`` with an allowed tag with an allowed ``style`` attribute were vulnerable to ReDoS. For example, ``bleach.clean(..., attributes={'a': ['style']})``. * Style attributes with dashes, or single or double quoted values are cleaned instead of passed through. update to 3.1.3 (boo#1167379, CVE-2020-6816): * Add relative link to code of conduct. (#442) * Drop deprecated 'setup.py test' support. (#507) * Fix typo: curren -> current in tests/test_clean.py (#504) * Test on PyPy 7 * Drop test support for end of life Python 3.4 * ``bleach.clean`` behavior parsing embedded MathML and SVG content with RCDATA tags did not match browser behavior and could result in a mutation XSS. Calls to ``bleach.clean`` with ``strip=False`` and ``math`` or ``svg`` tags and one or more of the RCDATA tags ``script``, ``noscript``, ``style``, ``noframes``, ``iframe``, ``noembed``, or ``xmp`` in the allowed tags whitelist were vulnerable to a mutation XSS. This update was imported from the openSUSE:Leap:15.2:Update update project.
Patchnames: openSUSE-2021-571
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2020-6816
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Package Hub 15 SP2:python2-bleach-0:3.1.5-bp152.2.4.1.noarch —
Vendor Fix
Unresolved product id: SUSE Package Hub 15 SP2:python3-bleach-0:3.1.5-bp152.2.4.1.noarch —
Vendor Fix
Threats
Impact moderate
CVE-2020-6817
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 2 products, the same list as for CVE-2020-6816
Threats
Impact important
CVE-2021-23980
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
Recommended 2 products, the same list as for CVE-2020-6816
Threats
Impact moderate
References
To clipboard 

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          "text": "bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={\u0027a\u0027: [\u0027style\u0027]}).",
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}



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