CVE-2019-9791

Source
Severity Critical
Remote Yes
Type Arbitrary code execution
Description
The type inference system in Firefox before 66.0 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.
Group Package Affected Fixed Severity Status Ticket
AVG-925 firefox 65.0.2-1 66.0-1 Critical Fixed
Date Advisory Group Package Severity Description
22 Mar 2019 ASA-201903-11 AVG-925 firefox Critical multiple issues
References
https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9791
https://bugzilla.mozilla.org/show_bug.cgi?id=1530958