Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=1827142%2C1932783 | issue tracking broken link |
| https://www.mozilla.org/security/advisories/mfsa2025-01/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-02/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-04/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-05/ | vendor advisory |