#VU69330 Input validation error in Mozilla Firefox and Firefox for Android - CVE-2022-45415

Vulnerability identifier: #VU69330

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-45415

CWE-ID: CWE-20

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 insecure handling of downloaded files. When downloading an HTML file, if the title of the page is formatted as a filename with a malicious extension, Firefox will saved the file with that extension, leading to possible system compromise if the downloaded file is later executed.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 103.0 - 106.0.5

Firefox for Android: 103.1.0 - 106.1.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2022-47/

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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.