When removing data about an origin whose tab was recently closed, a use-after-free could occur in the Quota manager, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://www.mozilla.org/security/advisories/mfsa2020-08/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-10/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-09/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1610880 | third party advisory issue tracking permissions required |
| https://usn.ubuntu.com/4328-1/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/4335-1/ | third party advisory vendor advisory |