CVE-2021-33737 - CVE House
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Status published High CVE-2021-33737

A vulnerability has been identified in SIMATIC CP 343-1 (incl....

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

Affected Software

SIMATIC CP 343-1 (incl. SIPLUS variants), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants), SIMATIC CP 343-1 ERPC, SIMATIC CP 343-1 Lean (incl. SIPLUS variants), SIMATIC CP 443-1, SIMATIC CP 443-1 Advanced, SIPLUS NET CP 443-1, SIPLUS NET CP 443-1 Advanced
Vulnerable Versions:
All versions, All versions < V3.3

Timeline

Official Publish: September 14th, 2021
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: 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

Weaknesses (CWE)