CVE-2018-12387

high-risk
Published 2018-10-18

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.

Do I need to act?

!
33.4% chance of exploitation in next 30 days
EPSS score — higher than 67% 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
9
CVSS 9.1/10 Critical
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=1493903
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=1493903
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/
65
/ 100
high-risk
Severity 31/34 · Critical
Exploitability 16/34 · Moderate
Exposure 18/34 · Moderate