An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1923344 | issue tracking permissions required |
| https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-49039 | patch not applicable vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2024-51/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2024-52/ | vendor advisory |
| https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281992 | issue tracking |
| https://lists.debian.org/debian-lts-announce/2024/10/msg00005.html | mailing list |