Vulnerability identifier: #VU83371

Vulnerability risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-6208

CWE-ID: CWE-200

Exploitation vector: Local

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 local user to gain access to potentially sensitive information.

The vulnerability exists due to the Selection API copies text by mistake into the primary selection, a temporary storage not unlike the clipboard, when using on X11. A local user can gain access to potentially sensitive information.

Note, the vulnerability affects only Firefox installations on X11.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 119.0.1

Firefox ESR: 115.0 - 115.4.0, 102.0 - 102.15.1

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-49/
http://www.mozilla.org/en-US/security/advisories/mfsa2023-50/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.