#VU57390 Path traversal in SINEC NMS - CVE-2021-33725

Vulnerability identifier: #VU57390

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33725

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINEC NMS
Server applications / Remote management servers, RDP, SSH

Vendor: Siemens

Description

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote administrator can send a specially crafted HTTP request and delete arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

SINEC NMS: before 1.0

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-287-05
https://cert-portal.siemens.com/productcert/pdf/ssa-163251.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.