Out-of-bounds write in Mozilla Firefox - CVE-2018-12379

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Main Vulnerability Database Vulnerabilities #VU14635

Out-of-bounds write in Mozilla Firefox - CVE-2018-12379

Published: September 6, 2018


Vulnerability identifier: #VU14635
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-12379
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to out-of-bounds write when the Mozilla Updater opens a MAR format file which contains a very long item filename. A local attacker can run the Mozilla Updater on the local system with the malicious MAR file, 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
Gentoo Linux
Arch Linux
Debian Linux
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power
Mozilla Thunderbird

How to mitigate CVE-2018-12379

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