CVE-2019-9792
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.
- Score
- CVSS 3.1 9.8 Critical
- Status
- Modified - security@mozilla.org
- Published
- 2019-04-26
- Last modified
- 2024-08-04
- Weaknesses
- CWE-787
Affected products
- Firefox (Mozilla)
- Firefox Esr (Mozilla)
- Thunderbird (Mozilla)
- Enterprise Linux (Redhat)
- Enterprise Linux Eus (Redhat)
- Enterprise Linux Server Aus (Redhat)
- Enterprise Linux Server Tus (Redhat)
References
- http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html
- https://access.redhat.com/errata/RHSA-2019:0966
- https://access.redhat.com/errata/RHSA-2019:1144
- https://bugzilla.mozilla.org/show_bug.cgi?id=1532599
- https://www.mozilla.org/security/advisories/mfsa2019-07/
- https://www.mozilla.org/security/advisories/mfsa2019-08/
- https://www.mozilla.org/security/advisories/mfsa2019-11/
