Vulnerability identifier: #VU83563

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-49105

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: ownCloud

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in WebDAV API. A remote attacker can bypass authentication process using Pre-Signed URLs and compromise the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ownCloud Server: 10.6.0 - 10.13.0

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External links
http://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/

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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. However, proof of concept for this vulnerability is available.