Products

Firefox

• < 129

• ESR < 115.14

• ESR < 128.1

Source

security@mozilla.org

Published : Aug. 6, 2024, 1:15 p.m.
Last Modified : Aug. 6, 2024, 4:30 p.m.

Description

Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.

References

URL	Source
https://bugzilla.mozilla.org/show_bug.cgi?id=1909241	security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2024-33/	security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2024-34/	security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2024-35/	security@mozilla.org