Vulnerability identifier: #VU80096

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4579

CWE-ID: CWE-20

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 a spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input when handling persistent search terms. Search queries in the default search engine can appear to have been the currently navigated URL if the search query itself is a well formed URL. As a result, a remote attacker can perform a spoofing attack if it had been maliciously set as the default search engine.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 116.0 - 116.0.3

Firefox for Android: 116.0 - 116.3.0

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

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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.