#VU78845 Origin validation error in Mozilla products - CVE-2023-4045

Vulnerability identifier: #VU78845

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-2023-4045

CWE-ID: CWE-346

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox ESR
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 improper tracking of cross-origin tainting in Offscreen Canvas. A remote attacker can violation the same-origin policy and access image data from another website.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 115.0.3

Firefox for Android: 100.1.0 - 115.2.1

Firefox ESR: 102.0 - 102.13.0, 115.0 - 115.0.3

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2023-29/
https://www.mozilla.org/en-US/security/advisories/mfsa2023-30/
https://www.mozilla.org/en-US/security/advisories/mfsa2023-31/

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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.