Use-after-free in Mozilla Firefox - CVE-2018-12377

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Main Vulnerability Database Vulnerabilities #VU14633

Use-after-free in Mozilla Firefox - CVE-2018-12377

Published: September 5, 2018 / Updated: September 6, 2018


Vulnerability identifier: #VU14633
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-12377
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to use-after-free error when refresh driver timers are refreshed in some circumstances during shutdown when the timer is deleted while still in use. A remote unauthenticated attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Mozilla Firefox
Firefox ESR
Debian Linux
Gentoo Linux
Arch Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power
Opensuse
Mozilla Thunderbird

How to mitigate CVE-2018-12377

Update to version 62.0.

Mozilla Firefox - update to 62.0
Mozilla Thunderbird - update to 60.2.1
Firefox ESR - update to 60.2.0

External References

Related Security Bulletins