Permissions, Privileges, and Access Controls in Firefox ESR and Mozilla Firefox - CVE-2020-15663
Published: August 25, 2020 / Updated: August 26, 2020
Vulnerability identifier: #VU46015
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2020-15663
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox ESR
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due Mozilla Maintenance Service does not check if the updater.exe file has a valid signature before executing it with elevated privileges. A local user with ability to replace the updater.exe file file can execute arbitrary code with SYSTEM privileges.
How to mitigate CVE-2020-15663
Install updates from vendor's website.