Vulnerability Description
A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 63.0 |
| Mozilla | Firefox Esr | < 60.3 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server Aus | 7.6 |
| Redhat | Enterprise Linux Server Eus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.6 |
| Redhat | Enterprise Linux Workstation | 6.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/105718Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041944Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3005Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3006Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1483602Broken LinkIssue TrackingVendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00008.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201811-04Third Party Advisory
- https://usn.ubuntu.com/3801-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4324Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-26/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-27/Vendor Advisory
- http://www.securityfocus.com/bid/105718Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041944Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3005Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3006Third Party Advisory
FAQ
What is CVE-2018-12396?
CVE-2018-12396 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites wh...
How severe is CVE-2018-12396?
CVE-2018-12396 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-12396?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Debian Debian Linux, Canonical Ubuntu Linux, Redhat Enterprise Linux Desktop.