Bug 1988354 (CVE-2021-36773)

Summary:	CVE-2021-36773 mozilla-ublock-origin: crafted web sites may cause a denial of service
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dominik
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mozilla-ublock-origin 1.36.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-07-30 13:06:50 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:	1988355, 1988356
Bug Blocks:

Description Marian Rehak 2021-07-30 11:24:19 UTC

uBlock Origin before 1.36.2 support an arbitrary depth of parameter nesting for strict blocking, which allows crafted web sites to cause a denial of service (unbounded recursion that can trigger memory consumption and a loss of all blocking functionality).

https://news.ycombinator.com/item?id=27833752
https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatrix_denial_of_service.adoc

Comment 1 Marian Rehak 2021-07-30 11:24:47 UTC

Created mozilla-ublock-origin tracking bugs for this issue:

Affects: epel-7 [bug 1988356]
Affects: fedora-all [bug 1988355]

Comment 2 Product Security DevOps Team 2021-07-30 13:06:50 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.

Comment 3 Product Security DevOps Team 2021-07-30 19:06:48 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.