Bug 1820616 (CVE-2020-6817) - CVE-2020-6817 python-bleach: behavior parsing style attributes could result in a regular expression denial of service (ReDoS)
Summary: CVE-2020-6817 python-bleach: behavior parsing style attributes could result i...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-6817
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1820624 1820625
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-04-03 13:10 UTC by Michael Kaplan
Modified: 2020-04-03 16:31 UTC (History)
2 users (show)

Fixed In Version: python-bleach 3.1.4
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Environment:
Last Closed: 2020-04-03 16:31:57 UTC
Embargoed:

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Description Michael Kaplan 2020-04-03 13:10:30 UTC 
Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).
Comment 1 Michael Kaplan 2020-04-03 13:26:47 UTC 
Upstream Reference:

https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm
Comment 2 Michael Kaplan 2020-04-03 13:27:16 UTC 
Created python-bleach tracking bugs for this issue:

Affects: epel-all [bug 1820624]
Affects: fedora-all [bug 1820625]
Comment 3 Product Security DevOps Team 2020-04-03 16:31:57 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.
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