#VU84563 Multiple Interpretations of UI Input in Mozilla products - CVE-2023-6867

Vulnerability identifier: #VU84563

Vulnerability risk: Medium

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-6867

CWE-ID: CWE-450

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 perform clickjacking attack.

The vulnerability exists due to a timing issue when the user clicks on a button. The timing of a button click causing a popup to disappear was approximately the same length as the anti-clickjacking delay on permission prompts. A remote attacker can perform clickjacking attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 120.0.1

Firefox ESR: 102.0 - 102.15.1, 115.0 - 115.5.0

Firefox for Android: 66.0.4 - 120.1.1

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/
https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/

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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.