#VU74832 Security features bypass in Mozilla Firefox and Firefox ESR - CVE-2023-29542

Vulnerability identifier: #VU74832

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2023-29542

CWE-ID: CWE-254

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Mozilla Firefox
Firefox ESR

Software vendor:
Mozilla

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper handling of newline in a filename. A remote attacker can bypass the file extension security mechanisms that replaces dangerous file extensions such as .lnk with .download and potentially compromise the affected system.

Install updates from vendor's website.

• https://www.mozilla.org/en-US/security/advisories/mfsa2023-13/
• https://www.mozilla.org/en-US/security/advisories/mfsa2023-14/