Vulnerability in Mozilla Firefox
CVE-2018-12396
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Broken Link, Vendor Advisory)
- www.debian.org/security/2018/dsa-4324 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-26/ (Vendor Advisory)
- security.gentoo.org/glsa/201811-04 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-27/ (Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:3005 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/105718 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:3006 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3801-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/11/msg00008.html (mailing-list, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-12396?
- CVE-2018-12396 is a medium-severity vulnerability in Mozilla Firefox, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2019-02-28.
- How severe is CVE-2018-12396?
- Medium severity. CVSS v3 base score is 6.5 out of 10.