#VU77947 Insufficient UI Warning of Dangerous Operations in Mozilla Firefox and Firefox for Android - CVE-2023-37204

Vulnerability identifier: #VU77947

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-37204

CWE-ID: CWE-357

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to the way fullscreen notifications are handled within the browser. A remote attacker can obscure the fullscreen notification by using an option element by introducing lag via an expensive computational function and perform spoofing attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 103.0 - 114.0.2

Firefox for Android: 103.2.0 - 114.2.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2023-22/

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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.