Security Vulnerabilities fixed in Firefox ESR 78.11
- June 1, 2021
- Firefox ESR
- Fixed in
- Firefox ESR 78.11
- Ronald Crane
A locally-installed hostile program could send
WM_COPYDATA messages that Firefox would processing incorrectly, leading to an out-of-bounds read.
This bug only affects Firefox on Windows. Other operating systems are unaffected.
- Mozilla developers and community
Mozilla developers Gabriele Svelto, Anny Gakhokidze, Alexandru Michis, Christian Holler reported memory safety bugs present in Firefox 88 and Firefox ESR 78.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.