Full Report
SINEC INS before V1.0 SP2 Update 6 is affected by multiple vulnerabilities. Siemens has released a new version for SINEC INS and recommends to update to the latest version.
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Siemens SINEC INS
## CVE Details
- **CVE ID:** CVE-2026-46746
- **CVSS Score:** 8.8 (High) / 8.7 (CVSS v4.0)
- **CWE:** CWE-78 (OS Command Injection)
- **CVE ID:** CVE-2026-46747
- **CVSS Score:** 4.3 (Medium) / 5.3 (CVSS v4.0)
- **CWE:** CWE-26 (Path Traversal)
- **CVE ID:** CVE-2026-46748
- **CVSS Score:** 8.8 (High) / 8.7 (CVSS v4.0)
- **CWE:** CWE-250 (Execution with Unnecessary Privileges)
- **CVE ID:** CVE-2026-46749
- **CVSS Score:** 7.5 (High) / 5.0 (CVSS v4.0)
- **CWE:** CWE-760 (Use of a One-Way Hash with a Predictable Salt)
## Affected Systems
- **Products:** SINEC INS (Infrastructure Network Services)
- **Versions:** All versions < V1.0 SP2 Update 6
- **Configurations:** Systems utilizing the web-based management interface and SFTP API components.
## Vulnerability Description
SINEC INS is affected by several security flaws ranging from input validation issues to privilege management errors:
- **Command Injection (CVE-2026-46746):** The `/api/sftp/uploadFiles` endpoint fails to sanitize directory names, allowing shell commands to be stored and later executed with service-level privileges (`sinecins`).
- **Path Traversal (CVE-2026-46747):** The directory listing function in the SFTP API does not validate path inputs, allowing access to files outside the intended directory.
- **Privilege Escalation (CVE-2026-46748):** A system binary is misconfigured with the `cap_dac_override` capability, which allows the process to bypass standard file permission checks, potentially granting a local attacker root access.
- **Weak Cryptography (CVE-2026-46749):** The application uses a hardcoded, static salt and insufficient iterations for password hashing, making stored credentials susceptible to offline brute-force attacks.
## Exploitation
- **Status:** Not exploited (Reported via coordinated disclosure)
- **Complexity:** Low (for CVE-2026-46746, 46747, 46748); High (for CVE-2026-46749)
- **Attack Vector:** Network (Remote) for the API flaws; Local for privilege escalation and cryptographic analysis.
## Impact
- **Confidentiality:** High (Full file system access and credential recovery possible)
- **Integrity:** High (Arbitrary command execution and file modification)
- **Availability:** High (Potential for total system compromise)
## Remediation
### Patches
- **Update to SINEC INS V1.0 SP2 Update 6** or later versions.
### Workarounds
- **Network Segmentation:** Limit access to the SINEC INS web interface to trusted administrative networks only.
- **Access Control:** Ensure only authorized personnel have authenticated access to the application to mitigate remote exploitation risks.
- **Follow Siemens Operational Guidelines:** Implement industrial security standards as defined in the Siemens Industrial Security guidelines.
## Detection
- **Log Analysis:** Monitor web server logs for suspicious characters (e.g., `;`, `&`, `|`, `..`) within the `/api/sftp/uploadFiles` endpoint.
- **Audit Logs:** Review SINEC INS audit logs for unusual directory creation or file access patterns.
- **System Integrity:** Check for unauthorized modifications to system files or unexpected processes running under the `sinecins` user.
## References
- Siemens ProductCERT SSA-860189: hxxps://cert-portal[.]siemens[.]com/productcert/pdf/ssa-860189[.]pdf
- Siemens Industrial Security Guidelines: hxxps://www[.]siemens[.]com/cert/operational-guidelines-industrial-security
- Software Update Link: hxxps://support[.]industry[.]siemens[.]com/cs/ww/en/view/110002283/