QID 591419

QID 591419: SIMATIC NET CP Modules Denial of Service (DoS) Vulnerability (SSA-549234)

A denial of service vulnerability was identified in different types of Communication Processors of Siemens SIMATIC NET CP Modules.

The following versions of SIMATIC NET CP Modules, a communication processor, are affected:
SIMATIC CP 343-1 (incl. SIPLUS variants) all versions
SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) all versions
SIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0): all versions
SIMATIC CP 343-1 Lean (incl. SIPLUS variants): all versions
SIMATIC CP 443-1 (incl. SIPLUS variants): all versions
SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0): all versions
SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0): all versions

QID Detection Logic (Authenticated):
QID checks for the Vulnerable version of using passive scanning

On successful exploitation, An attacker could exploit this vulnerability causing the device to become un-operational until the device is restarted.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as High - 7.8 severity.
    • Solution
    No current fixes are released by the vendor.Workaround:
    Workaround:
    imit access to port 102/tcp to trusted users and systems only.
    Vendor References

    CVEs related to QID 591419

    CVE-2021-33737 |
    Software Advisories
    Advisory ID Software Component Link
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