CVE-2019-9791
CVSS v3
9.8
CRITICAL
EPSS Score
38.9 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2019-04-26
- Exploit-DB
- EDB-46613
Frequently asked questions
What is CVE-2019-9791?
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.
Is CVE-2019-9791 actively exploited?
Active exploitation of CVE-2019-9791 has not been confirmed. The EPSS score is 38.9%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-9791?
CVE-2019-9791 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2019-9791 affecting your environment?
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