Debian Security Advisory

DLA-3062-1 ublock-origin -- LTS security update

Date Reported:
29 Jun 2022
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 991386.
In Mitre's CVE dictionary: CVE-2021-36773.
More information:

uBlock, a Firefox add-on and efficient ads, malware and trackers blocker, supported 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).

Please note that webext-ublock-origin was replaced by webext-ublock-originfirefox.

For Debian 9 stretch, this problem has been fixed in version 1.42.0+dfsg-1~deb9u1.

We recommend that you upgrade your ublock-origin packages.

For the detailed security status of ublock-origin please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: