#VU78233 Allocation of Resources Without Limits or Throttling in Siemens products - CVE-2023-36521

Vulnerability identifier: #VU78233

Vulnerability risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-36521

CWE-ID: CWE-770

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC MV540 H
Hardware solutions / Firmware
SIMATIC MV540 S
Hardware solutions / Firmware
SIMATIC MV550 H
Hardware solutions / Firmware
SIMATIC MV550 S
Hardware solutions / Firmware
SIMATIC MV560 U
Hardware solutions / Firmware
SIMATIC MV560 X
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to allocation of resources without limits or throttling. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC MV540 H: before 3.3.4

SIMATIC MV540 S: before 3.3.4

SIMATIC MV550 H: before 3.3.4

SIMATIC MV550 S: before 3.3.4

SIMATIC MV560 U: before 3.3.4

SIMATIC MV560 X: before 3.3.4

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External links
https://cert-portal.siemens.com/productcert/txt/ssa-561322.txt

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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