CVE-2019-9792
Critical
Description
The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedApr 26, 2019
First seenApr 26, 2019
How to fix
Update
- mozilla firefox60.6.0, 66.0 or later
- mozilla thunderbird60.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 60.6.0, v < 66.0 | 60.6.0, 66.0 |
| mozilla thunderbird | v < 60.6.0 | 60.6.0 |
| redhat enterprise_linux | 8.0 | — |
| redhat enterprise_linux_eus | 8.1, 8.2, 8.4 | — |
| redhat enterprise_linux_server_aus | 8.2, 8.4 | — |
| redhat enterprise_linux_server_tus | 8.2, 8.4 | — |
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.