Vulnerability Description
Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered. This vulnerability affects Firefox ESR < 60.9, Firefox ESR < 68.1, and Firefox < 69.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 60.9 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538008Permissions Required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538015Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-27/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538008Permissions Required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1538015Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-27/Vendor Advisory
FAQ
What is CVE-2019-9812?
CVE-2019-9812 is a vulnerability with a CVSS score of 9.3 (CRITICAL). Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious...
How severe is CVE-2019-9812?
CVE-2019-9812 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2019-9812?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.