#VU85713 Security features bypass in Mozilla Firefox and Firefox ESR - CVE-2024-0747

Vulnerability identifier: #VU85713

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2024-0747

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox ESR
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to an error in the way the Content Security Policy handles unsafe-inline directive. When a parent page loaded a child in an iframe with unsafe-inline, the parent Content Security Policy could have overridden the child Content Security Policy.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 121.0.1

Firefox ESR: 102.0 - 102.15.1, 115.0 - 115.6.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2024-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2024-02/

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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.