CVE-2019-9813
UnknownEPSS 7.39%
Last modified
CVE-2019-9813 is a vulnerability of currently unknown severity. Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.. EPSS estimates a 7.39% chance of exploitation in the next 30 days.
Description
Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 60.6.1 |
| Mozilla | Firefox | < 66.0.1 |
| Mozilla | Thunderbird | < 60.6.1 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538006Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-10/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-12/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538006Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-10/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-12/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-9813?
Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
How severe is CVE-2019-9813?
Severity scoring for CVE-2019-9813 is pending analysis. The EPSS model estimates a 7.39% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9813?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2019-9813?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST