ICSA-22-195-12: Siemens SRCS VPN Feature in SIMATIC CP Devices
CISA advisory · released 2022-07-12
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 3, 2023-03-14 (final)
CISA's summary
Summary: The below referenced devices contain multiple vulnerabilities that could be exploited when the SINEMA Remote Connect Server (SRCS) VPN feature is used. The feature is not activated by default. The most severe could allow an attacker to execute arbitrary code with elevated privileges under certain circumstances. Siemens has released updates for the affected products and recommends to update to the latest versions.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) | >=V2.0_<V2.2.28 |
| Siemens | SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0) | <V3.0.22 |
| Siemens | SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) | >=V2.0_<V2.2.28 |
| Siemens | SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) | >=V2.0_<V2.2.28 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) | >=V2.0_<V2.2.28 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) | >=V2.0_<V2.2.28 |
| Siemens | SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) | <V3.3.46 |
| Siemens | SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0) | <V3.0.22 |
| Siemens | SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) | <V3.3.46 |
| Siemens | SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) | <V3.3.46 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2022-34819 — CVE-2022-34819 · CWE-122
The application lacks proper validation of user-supplied data when parsing specific messages. This could result in a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of device.
- CVE-2022-34820 — CVE-2022-34820 · CWE-77
The application does not correctly escape some user provided fields during the authentication process. This could allow an attacker to inject custom commands and execute arbitrary code with elevated privileges.
- CVE-2022-34821 — CVE-2022-34821 · CWE-94
By injecting code to specific configuration options for OpenVPN, an attacker could execute arbitrary code with elevated privileges.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting these vulnerabilities to CISA.
The advisory's legal notice
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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