CVE-2023-6863
High
Description
The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedDec 19, 2023
First seenDec 19, 2023
How to fix
Update
- mozilla firefox121.0 or later
- mozilla firefox_esr115.6 or later
- mozilla thunderbird115.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 121.0 | 121.0 |
| mozilla firefox_esr | v < 115.6 | 115.6 |
| mozilla thunderbird | v < 115.6 | 115.6 |
| debian debian_linux | 10.0, 11.0, 12.0 | — |
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.