If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2022-13/ | exploit vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2022-14/ | exploit vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2022-15/ | exploit vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1755621 | issue tracking exploit vendor advisory |