Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
| Software | From | Fixed in |
|---|---|---|
| mozilla / thunderbird | - | 68.9.0 |
| mozilla / firefox | - | 77.0 |
| mozilla / firefox_esr | - | 68.9.0 |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 19.10 | 19.10.x |
| canonical / ubuntu_linux | 20.04 | 20.04.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |