Integer overflow in MP4 playback in 64-bit versions
- December 15, 2015
- Ronald Crane
- Firefox, Firefox ESR, Thunderbird
- Fixed in
- Firefox 43
- Firefox ESR 38.5
- Thunderbird 38.5
Security researcher Ronald Crane reported a vulnerability found through code inspection. This issue is an integer overflow while processing an MP4 format video file when an a erroneously-small buffer is allocated and then overrun, resulting in a potentially exploitable crash.
This issue only affects 64-bit versions with 32-bit versions being unaffected.
In general this flaw cannot be exploited through email in the Thunderbird product, but is potentially a risk in browser or browser-like contexts.