Improper access control in Nextcloud Server



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-38299
CWE-ID CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Nextcloud Server
Client/Desktop applications / Messaging software

Vendor Nextcloud

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper access control

EUVDB-ID: #VU57649

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-38299

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can login to a vulnerable service using an attached FIDO2 authenticator without passing a check of the user presence.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Nextcloud Server: 20.0.0 - 22.1.1

CPE2.3 External links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g36v-67gv-h757/


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.



###SIDEBAR###