Bug 1827491 (CVE-2020-6816)

Summary:	CVE-2020-6816 python-bleach: Mutation cross-site scripting in bleach.clean
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	igor.raits, mrunge
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-bleach 3.1.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-24 04:31:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1827493, 1827494
Bug Blocks:

Description Pedro Sampaio 2020-04-24 03:44:23 UTC

In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False.

References:

https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743

Comment 1 Pedro Sampaio 2020-04-24 03:45:29 UTC

Created python-bleach tracking bugs for this issue:

Affects: epel-all [bug 1827494]
Affects: fedora-all [bug 1827493]

Comment 2 Product Security DevOps Team 2020-04-24 04:31:50 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.