CVE-2018-12386

high-risk
Published 2018-10-18

A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.

Do I need to act?

!
39.1% chance of exploitation in next 30 days
EPSS score — higher than 61% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10 High
NETWORK / LOW complexity

Affected Products (15)

Affected Vendors

Debian Redhat Mozilla Canonical

References (18)

Third Party Advisory http://www.securityfocus.com/bid/105460
Third Party Advisory http://www.securitytracker.com/id/1041770
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2881
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2884
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1493900
Third Party Advisory https://security.gentoo.org/glsa/201810-01
Third Party Advisory https://usn.ubuntu.com/3778-1/
Third Party Advisory https://www.debian.org/security/2018/dsa-4310
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-24/
Third Party Advisory http://www.securityfocus.com/bid/105460
Third Party Advisory http://www.securitytracker.com/id/1041770
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2881
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2884
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1493900
Third Party Advisory https://security.gentoo.org/glsa/201810-01
Third Party Advisory https://usn.ubuntu.com/3778-1/
Third Party Advisory https://www.debian.org/security/2018/dsa-4310
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-24/
63
/ 100
high-risk
Severity 28/34 · Critical
Exploitability 17/34 · Moderate
Exposure 18/34 · Moderate