OS Command Injection in Mozilla Firefox - CVE-2019-11751
Published: September 3, 2019
Vulnerability identifier: #VU20817
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-2019-11751
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper sanitization of logging-related command line parameters, when launching Firefox from another application. A remote attacker can create a specially crafted link, trick the victim to click on the link within an external application (e.g. messenger application) and write a log file to arbitrary location on the system, such as "Startup" folder. As a result a remote attacker can execute arbitrary code on the system.
Affected software
Mozilla Firefox
Firefox ESR
Firefox ESR
How to mitigate CVE-2019-11751
Install updates from vendor's website.
Mozilla Firefox - update to 69.0
Firefox ESR - update to 68.1.0
Firefox ESR - update to 68.1.0