ICSA-24-256-09: Siemens SIMATIC, SIPLUS, and TIM
CISA advisory · released 2024-09-10
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 2, 2025-05-06 (final)
CISA's summary
Summary: Multiple NULL pointer dereference vulnerabilities in the affected products could allow an attacker with network access to the webserver, to perform a denial of service attack. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) | <V3.5.20 |
| Siemens | SIMATIC CP 1243-1 (incl. SIPLUS variants) | <V3.5.20 |
| Siemens | SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) | <V3.5.20 |
| Siemens | SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) | <V3.5.20 |
| Siemens | SIMATIC CP 1243-7 LTE | <V3.5.20 |
| Siemens | SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) | <V3.5.20 |
| Siemens | SIMATIC HMI Comfort Panels (incl. SIPLUS variants) | vers:all/* |
| Siemens | SIMATIC IPC DiagBase | vers:all/* |
| Siemens | SIMATIC IPC DiagMonitor | vers:all/* |
| Siemens | SIMATIC WinCC Runtime Advanced | vers:all/* |
| Siemens | SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) | <V2.4.8 |
| Siemens | TIM 1531 IRC (6GK7543-1MX00-0XE0) | <V2.4.8 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2023-28827 — CVE-2023-28827 · CWE-476
The web server of the affected devices do not properly handle certain requests, causing a timeout in the watchdog, which could lead to the clean up of pointers. This could allow a remote attacker to cause a denial of service condition in the system.
- CVE-2023-30755 — CVE-2023-30755 · CWE-476
The web server of the affected devices do not properly handle the shutdown or reboot request, which could lead to the clean up of certain resources. This could allow a remote attacker with elevated privileges to cause a denial of service condition in the system.
- CVE-2023-30756 — CVE-2023-30756 · CWE-476
The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference. This could allow a remote attacker with no privileges to cause a denial of service condition in the system.
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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