CVEvulnerability
CVE-2021-36773
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-07-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-674
Description
uBlock Origin before 1.36.2 and nMatrix before 4.4.9 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).
Affected configurations
• sciruby nmatrix (< 4.4.9)
• ublockorigin ublock origin (< 1.36.2)
• umatrix project umatrix (< 1.4.2)
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatrix_denial_of_service.adoc Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00024.html Mailing List, Third Party Advisory
- https://news.ycombinator.com/item?id=27833752 Issue Tracking, Third Party Advisory
- https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatrix_denial_of_service.adoc Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00024.html Mailing List, Third Party Advisory
- https://news.ycombinator.com/item?id=27833752 Issue Tracking, Third Party Advisory