CVE-2019-9791
CRITICAL 9.8EPSS 19.9%
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.
- Affected
- Mozilla · Thunderbird · Firefox ESR · Firefox
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 19.91% chance of exploitation in the next 30 days, 97th percentile
- Published
- 2019-04-26
- Updated
- 2024-08-04
Proof-of-concept exploits (2)
ExploitDB entries (1)
Security advisories
- https://www.mozilla.org/security/advisories/mfsa2019-07
- https://www.mozilla.org/security/advisories/mfsa2019-08
- https://www.mozilla.org/security/advisories/mfsa2019-11
- https://access.redhat.com/errata/RHSA-2019:0966
- https://access.redhat.com/errata/RHSA-2019:1144