#VU91742 Improper Restriction of Rendered UI Layers or Frames in Mozilla Firefox and Firefox for Android - CVE-2024-5689

Vulnerability identifier: #VU91742

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-2024-5689

CWE-ID: CWE-1021

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 phishing attack.

The vulnerability exists due user confusion when taking screenshots with Firefox. In addition to detecting when a user was taking a screenshot (XXX), a website was able to overlay the "My Shots" button that appeared, and direct the user to a replica Firefox Screenshots page that could be used for phishing.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 120.0 - 126.0.1

Firefox for Android: 120.0 - 126.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2024-25/

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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.