#VU63875 Path traversal in Mozilla Firefox and Firefox ESR - CVE-2022-31739
Published: May 31, 2022 / Updated: November 9, 2022
Vulnerability identifier: #VU63875
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-31739
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when saving downloaded files on Windows. A remote attacker can use the "%" character in filename to store data outside the intended directory using Windows environment variables, such as %HOMEPATH% or %APPDATA%.
The vulnerability affects Windows installations only.
Remediation
Install update from vendor's website.