Path traversal in Nextcloud Android app

1) Path traversal

EUVDB-ID: #VU67417

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-2022-39210

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a local user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A local user can read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Nextcloud Android App: 3.0.0 - 3.20.3

CPE2.3

• cpe:2.3:a:nextcloud:android:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:nextcloud:android:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:nextcloud:android:3.0.2:*:*:*:*:*:*:*

External links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vw2w-gpcv-v39f/

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.