Vulnerability identifier: #VU82082
Vulnerability risk: Medium
CVSSv3.1: 4.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-307
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Nextcloud Enterprise Server
Client/Desktop applications /
Messaging software
Nextcloud Server
Client/Desktop applications /
Messaging software
Vendor: Nextcloud
Description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the number of login attempts is not limited within the WebDAV endpoint. A remote user can perform a brute-force attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Nextcloud Enterprise Server: 22.0.0 - 26.0.3
Nextcloud Server: 25.0.0 - 26.0.3
External links
http://hackerone.com/reports/1924212
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9
http://github.com/nextcloud/server/pull/38046
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.