CVE-2021-29964
High
Description
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Mozilla Firefox
PublishedJun 24, 2021
First seenJun 24, 2021
How to fix
Update
- mozilla firefox89.0 or later
- mozilla firefox_esr78.11 or later
- mozilla thunderbird78.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 89.0 | 89.0 |
| mozilla firefox_esr | v < 78.11 | 78.11 |
| mozilla thunderbird | v < 78.11 | 78.11 |
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