Bug 1988354 (CVE-2021-36773) - CVE-2021-36773 mozilla-ublock-origin: crafted web sites may cause a denial of service
Summary: CVE-2021-36773 mozilla-ublock-origin: crafted web sites may cause a denial of...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-36773
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: 1988355 1988356
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-07-30 11:24 UTC by Marian Rehak
Modified: 2021-07-30 19:06 UTC (History)
1 user (show)

Fixed In Version: mozilla-ublock-origin 1.36.2
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Last Closed: 2021-07-30 13:06:50 UTC

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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.
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