| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 77.0 | 77.0 |
| firefox esr | < 68.9.0 | 68.9.0 |
| thunderbird | < 68.9.0 | 68.9.0 |
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.
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