ICSA-21-257-18: Siemens Siveillance OIS
CISA advisory · released 2021-09-14
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: The Siveillance Open Interface Services (OIS) application used for integration of different subsystems to several Siemens building management systems contains a command injection vulnerability that could allow a remote unauthenticated attacker to execute code on the affected system with root privileges. Siemens has released patches and updates for Siveillance OIS to apply to the products that incorporate the OIS service, and recommends to update to the latest versions.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | Desigo CC | All_versions_with_OIS_Extension_Module |
| Siemens | GMA-Manager | <=with_OIS_running_on_Debian_9 |
| Siemens | Operation Scheduler | <=with_OIS_running_on_Debian_9 |
| Siemens | Siveillance Control | <=with_OIS_running_on_Debian_9 |
| Siemens | Siveillance Control Pro | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2021-31891 — CVE-2021-31891 · CWE-78
The affected application incorrectly neutralizes special elements in a specific HTTP GET request which could lead to command injection. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the system with root privileges.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability 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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