Improper input validation in Mozilla Firefox
CVE-2018-12387
A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content process. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.096 (95.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.096 · newest: 0.096 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 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 7.5, 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201810-01 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/105460 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3778-1/ (vendor-advisory, Third Party Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Patch, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2018/dsa-4310 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2884 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1041770 (VDB Entry, Third Party Advisory, vdb-entry)
- www.mozilla.org/security/advisories/mfsa2018-24/ (Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:2881 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-12387?
- CVE-2018-12387 is a critical-severity vulnerability in Mozilla Firefox, classified under Improper Input Validation. CVSS score: 9.1/10. Published 2018-10-18.
- How severe is CVE-2018-12387?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2018-12387 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.