OS Command Injection in Siemens SINEC NMS



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-33721
CWE-ID CWE-78
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SINEC NMS
Server applications / Remote management servers, RDP, SSH

Vendor Siemens

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU55774

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33721

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to the affected application incorrectly neutralizes special elements when creating batch operations. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SINEC NMS: before 1.0 SP2

CPE2.3 External links

http://cert-portal.siemens.com/productcert/pdf/ssa-756744.pdf


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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