Multiple vulnerabilities in Nextcloud Server

Published: 2022-04-27

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-24888 CVE-2022-24889
CWE-ID	CWE-93 CWE-352
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Nextcloud Server Client/Desktop applications / Messaging software
Vendor	Nextcloud

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) CRLF injection

EUVDB-ID: #VU62646

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-24888

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data. A remote user can pass specially crafted data to the application containing CR-LF characters and modify application behavior.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 20.0.14 - 22.2.3

CPE2.3

External links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w3h6-p64h-q9jp/

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.

2) Cross-site request forgery

EUVDB-ID: #VU62648

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-24889

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)