#VU57387 Improper Authorization in SINEC NMS - CVE-2021-33723

Vulnerability identifier: #VU57387

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-33723

CWE-ID: CWE-285

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 attacker to bypass authorization checks.

The vulnerability exists due to improper authorization. A remote authenticated attacker can change the password of any user in the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINEC NMS: before 1.0

---

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

---

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.