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CVE-2021-33737 PUBLISHED CVSS 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), 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.

EPSS 0.23% · 45.4th percentile

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:C
EPSS Score
0.23%
45.4th percentile

Affected Products

VendorProductVersions
SiemensSIMATIC CP 443-1All versions < V3.3, All versions < V3.3
SiemensSIMATIC CP 343-1 (incl. SIPLUS variants)All versions
siemenssimatic_cp_343-1_erpc_firmware
siemenssimatic_cp_343-1_advanced_firmware
SiemensSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)All versions
siemenssimatic_cp_443-1_advanced_firmware
siemenssimatic_cp_443-1_firmware
SiemensSIPLUS NET CP 443-1 AdvancedAll versions < V3.3
siemenssimatic_cp_343-1_firmware
SiemensSIMATIC CP 343-1 ERPCAll versions
siemenssimatic_cp_343-1_lean_firmware
SiemensSIMATIC CP 343-1 Lean (incl. SIPLUS variants)All versions
SiemensSIPLUS NET CP 443-1All versions < V3.3
SiemensSIMATIC CP 443-1 AdvancedAll versions < V3.3

Timeline

References

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