#VU77945 Security features bypass in Mozilla Firefox and Firefox for Android - CVE-2023-3482

Vulnerability identifier: #VU77945

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-3482

CWE-ID: CWE-254

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 bypass implemented security restrictions.

The vulnerability exists due to an error when Firefox is configured to block storage of all cookies. It is still possible to store data in localstorage by using an iframe with a source of 'about:blank'. A remote attacker can abuse such behavior to store tracking data without victim's permission.

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.