#VU64760 Error Handling in Mozilla Firefox - CVE-2022-34472

Vulnerability identifier: #VU64760

Vulnerability risk: Low

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

CVE-ID: CVE-2022-34472

CWE-ID: CWE-388

Exploitation vector: Network

Exploit availability: No

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

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to influence browser behavior.

The vulnerability exists due to improper error handling when processing unavailable PAC file. If a PAC URL is set and the server that hosts the PAC is unreachable, OCSP requests are blocked, resulting in incorrect error pages being shown.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 90.0 - 101.0.1

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2022-24/

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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.