#VU55562 Improper Protection of Alternate Path in ownCloud Server - CVE-2021-35949

Vulnerability identifier: #VU55562

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-35949

CWE-ID: CWE-424

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ownCloud Server
Web applications / Modules and components for CMS

Vendor: ownCloud

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerabiity exists due to the permission check for a file drop can be circumvented by using the shareinfo API. A remote authenticated attacker can see the files in the filedrop.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.0 - 10.7.0

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External links
https://owncloud.com/security-advisories/cve-2021-35949/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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