Improper Verification of Source of a Communication Channel in Siemens CP343-1 Devices

1) Improper Verification of Source of a Communication Channel

EUVDB-ID: #VU86546

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-51440

CWE-ID: CWE-940 - Improper Verification of Source of a Communication Channel

Exploit availability: No

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

External links

http://cert-portal.siemens.com/productcert/html/ssa-516818.html

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.