Vulnerability 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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sciruby | Nmatrix | < 4.4.9 |
| Ublockorigin | Ublock Origin | < 1.36.2 |
| Umatrix Project | Umatrix | < 1.4.2 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00024.htmlMailing ListThird Party Advisory
- https://news.ycombinator.com/item?id=27833752Issue TrackingThird Party Advisory
- https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00024.htmlMailing ListThird Party Advisory
- https://news.ycombinator.com/item?id=27833752Issue TrackingThird Party Advisory
FAQ
What is CVE-2021-36773?
CVE-2021-36773 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 recursi...
How severe is CVE-2021-36773?
CVE-2021-36773 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-36773?
Check the references section above for vendor advisories and patch information. Affected products include: Sciruby Nmatrix, Ublockorigin Ublock Origin, Umatrix Project Umatrix, Debian Debian Linux.