#VU86546 Improper Verification of Source of a Communication Channel in Siemens products - CVE-2023-51440

Vulnerability identifier: #VU86546

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2023-51440

CWE-ID: CWE-940

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC CP 343-1
Hardware solutions / Firmware
SIMATIC CP 343-1 LEAN
Hardware solutions / Firmware
SIPLUS NET CP 343-1
Hardware solutions / Firmware
SIPLUS NET CP 343-1 Lean
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 the affected products incorrectly validate TCP sequence numbers. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC CP 343-1: All versions

SIMATIC CP 343-1 LEAN: All versions

SIPLUS NET CP 343-1: All versions

SIPLUS NET CP 343-1 Lean: All versions

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External links
https://cert-portal.siemens.com/productcert/html/ssa-516818.html

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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.