#VU97927 Improper Restriction of Rendered UI Layers or Frames in Firefox Focus for Android - CVE-2024-9391

Vulnerability identifier: #VU97927

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-2024-9391

CWE-ID: CWE-1021

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Firefox Focus 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 an error when exiting fullscreen mode. A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. This may allow spoofing of other sites as the address bar is no longer visible.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox Focus for Android: before 131.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2024-46/
https://bugzilla.mozilla.org/show_bug.cgi?id=1892407

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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.