#VU64755 Input validation error in Mozilla Firefox - CVE-2022-34476

Vulnerability identifier: #VU64755

Vulnerability risk: Medium

CVSSv4.0: 4.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-34476

CWE-ID: CWE-20

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 perform a spoofing attack.

The vulnerability exists due to insufficient validation of an indefinite SEQUENCE inside an indefinite GROUP when parsing ASN.1. A remote attacker can trick the browser into accessing a malformed ASN.1 and perform spoofing attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 92.0 - 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.