Vulnerability identifier: #VU73674

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28163

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application when downloading files through the Save As dialog on Windows with suggested filenames containing environment variable names. A remote attacker can gain unauthorized access to sensitive information on the system.

Note, the vulnerability affects only Windows installations.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 110.0.1

Firefox ESR: 102.0 - 102.8.0

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-09/

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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.