critical
9.1
CWE
20
Advisory Published
CVE Published
Updated

CVE-2018-12387: Input Validation

First published: Tue Oct 02 2018(Updated: )

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.

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox<62.0.3
62.0.3
Mozilla Firefox ESR<60.2.2
60.2.2
redhat enterprise Linux desktop=6.0
redhat enterprise Linux desktop=7.0
redhat enterprise Linux server=6.0
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.6
redhat enterprise Linux server eus=7.5
redhat enterprise Linux server eus=7.6
redhat enterprise Linux server tus=7.6
redhat enterprise Linux workstation=6.0
redhat enterprise Linux workstation=7.0
Debian Debian Linux=9.0
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Mozilla Firefox<62.0.3
Mozilla Firefox ESR<60.2.2
debian/firefox
134.0.2-3
debian/firefox-esr
115.14.0esr-1~deb11u1
128.6.0esr-1~deb11u3
128.5.0esr-1~deb12u1
128.6.0esr-1~deb12u1
128.6.0esr-4

Remedy

https://bugzilla.mozilla.org/show_bug.cgi?id=1493903

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2018-12387?

    CVE-2018-12387 has been classified as a high severity vulnerability.

  • How do I fix CVE-2018-12387?

    To fix CVE-2018-12387, update Firefox to version 62.0.3 or later, or to corresponding patched versions of Firefox ESR and affected distributions.

  • Which software is affected by CVE-2018-12387?

    CVE-2018-12387 affects Mozilla Firefox versions up to 62.0.3 and Firefox ESR up to 60.2.2, as well as several versions of Red Hat Enterprise Linux and Debian.

  • Can CVE-2018-12387 be exploited remotely?

    Yes, CVE-2018-12387 can potentially be exploited remotely through malicious JavaScript code.

  • What is the impact of CVE-2018-12387 if exploited?

    Exploitation of CVE-2018-12387 could lead to memory address leaks and potentially allow for further exploitation within sandboxed content.

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