Heap-based buffer overflow in Mozilla Firefox - CVE-2020-15667
Published: August 25, 2020
Vulnerability identifier: #VU46022
CSH Severity: Low
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-15667
CWE-ID: CWE-122
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 a boundary error when processing a MAR update file, after the signature has been validated. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the malicious file is signed with a valid Mozilla-controlled signing key.
Affected software
Mozilla Firefox
firefox (Alpine package)
firefox (Alpine package)
How to mitigate CVE-2020-15667
Install updates from vendor's website.
Mozilla Firefox - update to 80.0