| Severity |
|
| Remote |
|
| 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. |
|
| References |
| + |
https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9791 |
| + |
https://bugzilla.mozilla.org/show_bug.cgi?id=1530958 |
|
| Notes |
|