Multiple vulnerabilities in Nextcloud Server and Enterprise Server

Published: 2023-02-22

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-25162 CVE-2023-25161
CWE-ID	CWE-918 CWE-284
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Nextcloud Server Client/Desktop applications / Messaging software Nextcloud Enterprise Server Client/Desktop applications / Messaging software
Vendor	Nextcloud

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU72490

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-25162

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 23.0.0 - 24.0.7

Nextcloud Enterprise Server: 23.0.0 - 24.0.7

CPE2.3

External links

http://github.com/nextcloud/server/pull/34160
http://hackerone.com/reports/1702864
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-mqrx-grp7-244m

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.

2) Improper access control

EUVDB-ID: #VU72493

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-25161

CWE-ID: CWE-284 - Improper Access Control