Vulnerability identifier: #VU78854

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4054

CWE-ID: CWE-357

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox ESR
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a missing warning when opening appref-ms files. A remote attacker can trick the victim to open a malicious appref-ms file and compromise the affected system.

Note, the vulnerability affects Windows installations only.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 115.0.3

Firefox ESR: 115.0 - 115.0.3, 102.0 - 102.13.0

---

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-29/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-31/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-30/

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.