On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2020-13/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-12/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-14/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1544181 | issue tracking permissions required |
| https://usn.ubuntu.com/4335-1/ | third party advisory vendor advisory |