CVE-2021-29989
High
Description
Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. 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. This vulnerability affects Thunderbird < 78.13, Firefox ESR < 78.13, and Firefox < 91.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedAug 17, 2021
First seenAug 17, 2021
How to fix
Update
- mozilla firefox91.0 or later
- mozilla firefox_esr78.13.0 or later
- mozilla thunderbird78.13.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 91.0 | 91.0 |
| mozilla firefox_esr | v < 78.13.0 | 78.13.0 |
| mozilla thunderbird | v < 78.13.0 | 78.13.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.