openSUSE Security Update: Security update for python-bleach ______________________________________________________________________________

Announcement ID: openSUSE-SU-2021:0571-1 Rating: important References: #1167379 #1168280 #1184547 Cross-References: CVE-2020-6816 CVE-2020-6817 CVE-2021-23980

CVSS scores: CVE-2020-6816 (NVD) : 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVE-2021-23980 (SUSE): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Products: openSUSE Backports SLE-15-SP2 ______________________________________________________________________________

An update that fixes three vulnerabilities is now available.

Description:

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.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Backports SLE-15-SP2:

zypper in -t patch openSUSE-2021-571=1

Package List:

- openSUSE Backports SLE-15-SP2 (noarch):

python2-bleach-3.1.5-bp152.2.4.1 python3-bleach-3.1.5-bp152.2.4.1

References:

https://www.suse.com/security/cve/CVE-2020-6816.html https://www.suse.com/security/cve/CVE-2020-6817.html https://www.suse.com/security/cve/CVE-2021-23980.html https://bugzilla.suse.com/1167379 https://bugzilla.suse.com/1168280 https://bugzilla.suse.com/1184547