Vulnerability identifier: #VU14481

Vulnerability risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3775

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nextcloud Server
Client/Desktop applications / Messaging software

Vendor: Nextcloud

Description

The disclosed vulnerability allows a remote attacker to bypass authentication on the target system.

The vulnerability exists due to improper authentication. A remote authenticated attacker that obtained user credentials can bypass the 2 Factor Authentication.

Mitigation
Update to version 12.0.3.

Vulnerable software versions

Nextcloud Server: 11.0.0 - 12.0.2

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External links
http://nextcloud.com/security/advisory/?id=NC-SA-2018-007

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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.