CVE-2021-33737 — HIGH (7.5)

Q: How severe is CVE-2021-33737?

CVE-2021-33737 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-33737?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic Cp 343-1 Firmware, Siemens Simatic Cp343-1, Siemens Simatic Cp 343-1 Advanced Firmware, Siemens Simatic Cp343-1 Advanced, Siemens Simatic Cp 343-1 Erpc Firmware.

Vulnerability Description

A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Siemens	Simatic Cp 343-1 Firmware	All versions
Siemens	Simatic Cp343-1	-
Siemens	Simatic Cp 343-1 Advanced Firmware	All versions
Siemens	Simatic Cp343-1 Advanced	-
Siemens	Simatic Cp 343-1 Erpc Firmware	All versions
Siemens	Simatic Cp 343-1 Erpc	All versions
Siemens	Simatic Cp 343-1 Lean Firmware	All versions
Siemens	Simatic Cp 343-1 Lean	All versions
Siemens	Simatic Cp 443-1 Firmware	All versions
Siemens	Simatic Cp 443-1	All versions
Siemens	Simatic Cp 443-1 Advanced Firmware	All versions
Siemens	Simatic Cp 443-1 Advanced	All versions

Related Weaknesses (CWE)

CWE-119

References

https://cert-portal.siemens.com/productcert/pdf/ssa-549234.pdfPatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-549234.pdfPatchVendor Advisory

FAQ

What is CVE-2021-33737?

CVE-2021-33737 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), ...

How severe is CVE-2021-33737?

CVE-2021-33737 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-33737?

Check the references section above for vendor advisories and patch information. Affected products include: Siemens Simatic Cp 343-1 Firmware, Siemens Simatic Cp343-1, Siemens Simatic Cp 343-1 Advanced Firmware, Siemens Simatic Cp343-1 Advanced, Siemens Simatic Cp 343-1 Erpc Firmware.