#VU69628 Improper Certificate Validation in desktop - CVE-2022-39334

Vulnerability identifier: #VU69628

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-39334

CWE-ID: CWE-295

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
desktop
Other software / Other software solutions

Vendor: Nextcloud

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to improper certificate verification. A local user can perform a man-in-the-middle (MitM) attack and gain access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

desktop: 3.0.0 - 3.6.0

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External links
https://hackerone.com/reports/1699740
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-82xx-98xv-4jxv
https://github.com/nextcloud/desktop/pull/5022
https://github.com/nextcloud/desktop/issues/4927

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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.