| Package | Affected versions | Patched versions |
|---|---|---|
| thunderbird | < 140.13.0 | 140.13.0 |
The code to parse MIME headers for display when forwarding a message (if the setting to view all headers was enabled) had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in Thunderbird 153 and Thunderbird 140.13.
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