CVE-2019-9791
9.8
CRITICAL
CVSS 3.1
EPSS 38.1%
Description
The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
How to fix CVE-2019-9791
To remediate CVE-2019-9791, upgrade the affected package to a fixed version below.
- —upgrade to 60.6.0esr-1 or later
- —upgrade to 1:60.6.1-1 or later
Is CVE-2019-9791 being exploited?
Moderate — EPSS is 38.1%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 60.6.0esr-1
- from 0, < 1:60.6.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |