Vulnerability identifier: #VU80094

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4581

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
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

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

The vulnerability exists due to a missing warning when downloading Excel .xll add-in files. A remote attacker can trick the victim to visit a specially crafted website and force the browser to download potentially dangerous files without any warning.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 116.0.3

Firefox ESR: 115.0 - 115.1.0, 102.0 - 102.14.0

Firefox for Android: 100.1.0 - 116.3.0

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-34/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-35/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-36/

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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.