Firefox ESR and 3 others: A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly,…
CVE-2021-29964 is fixed in 2 products on 1 platform, first by Mozilla Thunderbird (en-US) 78.11.0, released May 28, 2021. It is not reported as exploited. Patch Radar priority: High.
A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 91.0 | Mozilla Firefox ESR (en-US) 91.0 | Aug 4, 2021 |
| Mozilla Thunderbird (en-US) | 78.11.0 | Mozilla Thunderbird (en-US) 78.11.0 | May 28, 2021 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.