Denial of service in Siemens SIPROTEC 5 Devices

1) Input validation error

EUVDB-ID: #VU73707

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-38767

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input during the IP Radius access procedure. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIPROTEC 5 Compact 7SX800 (CP050): 8.70

SIPROTEC 5 7VK87 (CP300): 7.80

SIPROTEC 5 7VE85 (CP300): 7.80

SIPROTEC 5 7UT87 (CP300): 7.80

SIPROTEC 5 7UT86 (CP300): 7.80

SIPROTEC 5 7UT85 (CP300): 7.80

SIPROTEC 5 7UM85 (CP300): 7.80

SIPROTEC 5 7SX85 (CP300): 8.30

SIPROTEC 5 7ST86 (CP300): 9.20

SIPROTEC 5 7ST85 (CP300): 8.81

SIPROTEC 5 7SS85 (CP300): 7.80

SIPROTEC 5 7SL87 (CP300): 7.80

SIPROTEC 5 7SL86 (CP300): 7.80

SIPROTEC 5 7SK85 (CP300): 7.80

SIPROTEC 5 7SJ86 (CP300): 7.80

SIPROTEC 5 7SJ85 (CP300): 7.80

SIPROTEC 5 7SD87 (CP300): 7.80

SIPROTEC 5 7SD86 (CP300): 7.80

SIPROTEC 5 7SA87 (CP300): 7.80

SIPROTEC 5 7SA86 (CP300): 7.80

SIPROTEC 5 7KE85 (CP300): 7.80

SIPROTEC 5 6MU85 (CP300): 7.90

SIPROTEC 5 6MD89 (CP300): 7.80

SIPROTEC 5 6MD86 (CP300): 7.80

SIPROTEC 5 6MD85 (CP300): 7.80

SIPROTEC 5 Communication Module ETH-BD-2FO: 7.80

SIPROTEC 5 Communication Module ETH-BB-2FO: 7.80

SIPROTEC 5 Communication Module ETH-BA-2EL: 7.80

External links

http://cert-portal.siemens.com/productcert/txt/ssa-726834.txt

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 device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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