Remote code execution in Siemens Desigo CC Family



Published: 2021-09-15
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-37181
CWE ID CWE-502
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Desigo CC
Server applications / SCADA systems

Desigo CC Compact
Server applications / SCADA systems

Cerberus DMS
Server applications / SCADA systems

Vendor Siemens

Security Advisory

This security advisory describes one high risk vulnerability.

1) Deserialization of Untrusted Data

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-37181

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in the CCOM communication component. A remote attacker can pass specially crafted data to the application and execute arbitrary code 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

Desigo CC: 4.0, 4.1, 4.2, 5.0

Desigo CC Compact: 4.0, 4.1, 4.2, 5.0

Cerberus DMS: 4.0, 4.1, 4.2, 5.0

CPE External links

https://cert-portal.siemens.com/productcert/pdf/ssa-453715.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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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