CVE-2022-43716

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-11 · updated 2026-10-23
Weakness: CWE-416

Description

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE0) (All versions < V3.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE1) (All versions < V3.3), SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0) (All versions < V3.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) (All versions < V3.4.29), SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0) (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0) (All versions < V3.3), SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) (All versions < V3.4.29), SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) (All versions < V3.4.29), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.3.6), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.3.6). The webserver of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation which leads to a restart of the webserver of the affected product.

Affected products

Siemens Simatic Cp 1242-7 V2 Firmware: all versions
Siemens Simatic Cp 1243-1 Dnp3 Firmware: all versions
Siemens Simatic Cp 1243-1 Firmware: all versions
Siemens Simatic Cp 1243-1 Iec Firmware: all versions
Siemens Simatic Cp 1243-7 Lte Eu Firmware: all versions
Siemens Simatic Cp 1243-7 Lte Us Firmware: all versions
Siemens Simatic Cp 1243-8 Irc Firmware: all versions
Siemens Simatic Cp 1542Sp-1 Firmware: all versions
Siemens Simatic Cp 1542Sp-1 Irc Firmware: all versions
Siemens Simatic Cp 1543Sp-1 Firmware: all versions
Siemens Simatic Cp 443-1 Advanced Firmware: before 3.3 — fixed in 3.3
Siemens Simatic Cp 443-1 Firmware: before 3.3 — fixed in 3.3
Siemens Simatic Ipc Diagbase Firmware: all versions
Siemens Simatic Ipc Diagmonitor Firmware: all versions
Siemens Siplus Et 200Sp Cp 1542Sp-1 Irc Tx Rail Firmware: all versions
Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Firmware: all versions
Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Tx Rail Firmware: all versions
Siemens Siplus Net Cp 1242-7 V2 Firmware: all versions
Siemens Siplus Net Cp 443-1 Advanced Firmware: before 3.3 — fixed in 3.3
Siemens Siplus Net Cp 443-1 Firmware: before 3.3 — fixed in 3.3
Siemens Siplus S7-1200 Cp 1243-1 Firmware: all versions
Siemens Siplus S7-1200 Cp 1243-1 Rail Firmware: all versions
Siemens Siplus Tim 1531 Irc Firmware: before 2.3.6 — fixed in 2.3.6
Siemens AG TIM 1531 IRC: before 2.3.6 — fixed in 2.3.6

How to fix

Upgrade to a fixed version: Siemens Simatic Cp 443-1 Advanced Firmware 3.3; Siemens Simatic Cp 443-1 Firmware 3.3; Siemens Siplus Net Cp 443-1 Advanced Firmware 3.3; Siemens Siplus Net Cp 443-1 Firmware 3.3; Siemens Siplus Tim 1531 Irc Firmware 2.3.6; Siemens AG TIM 1531 IRC 2.3.6. Check the vendor advisory for mitigations.

References

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