Siemens SIMATIC CP 1242-7 V2 Webserver use after free

Summaryinfo

A vulnerability marked as critical has been reported in Siemens SIMATIC CP 1242-7 V2, SIMATIC CP 1243-1, SIMATIC CP 1243-1 DNP3, SIMATIC CP 1243-1 IEC, SIMATIC CP 1243-7 LTE EU, SIMATIC CP 1243-7 LTE US, SIMATIC CP 1243-8 IRC, SIMATIC CP 1542SP-1, SIMATIC CP 1542SP-1 IRC, SIMATIC CP 1543SP-1, SIMATIC CP 443-1, SIMATIC CP 443-1 Advanced, SIMATIC IPC DiagBase and SIMATIC IPC DiagMonitor. The affected element is an unknown function of the component Webserver. Performing a manipulation results in use after free. This vulnerability is known as CVE-2022-43716. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Siemens SIMATIC CP 1242-7 V2, SIMATIC CP 1243-1, SIMATIC CP 1243-1 DNP3, SIMATIC CP 1243-1 IEC, SIMATIC CP 1243-7 LTE EU, SIMATIC CP 1243-7 LTE US, SIMATIC CP 1243-8 IRC, SIMATIC CP 1542SP-1, SIMATIC CP 1542SP-1 IRC, SIMATIC CP 1543SP-1, SIMATIC CP 443-1, SIMATIC CP 443-1 Advanced, SIMATIC IPC DiagBase and SIMATIC IPC DiagMonitor (SCADA Software). This affects an unknown code of the component Webserver. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was published 04/11/2023 as ssa-566905. It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is uniquely identified as CVE-2022-43716 since 10/24/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/24/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC CP 443-1
• SIMATIC CP 443-1 Advanced
• SIMATIC CP 1242-7 V2
• SIMATIC CP 1243-1
• SIMATIC CP 1243-1 DNP3
• SIMATIC CP 1243-1 IEC
• SIMATIC CP 1243-7 LTE EU
• SIMATIC CP 1243-7 LTE US
• SIMATIC CP 1243-8 IRC
• SIMATIC CP 1542SP-1
• SIMATIC CP 1542SP-1 IRC
• SIMATIC CP 1543SP-1
• SIMATIC IPC DiagBase
• SIMATIC IPC DiagMonitor

License

• commercial

Website

• Vendor: https://www.siemens.com/

CPE 2.3info

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Entryinfo

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