Full Report
SINEC INS before V1.0 SP2 Update 2 is affected by multiple vulnerabilities. Siemens has released an update for SINEC INS and recommends to update to the latest version.
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in SINEC INS
## CVE Details
- **CVE ID:** CVE-2023-48427 (Critical), CVE-2023-0464, CVE-2023-27538, CVE-2023-48428, CVE-2023-48429, CVE-2023-48430, CVE-2023-48431
- **CVSS Score:** 8.1 (High/Critical) - *Note: While the summary lists 8.1, individual scores vary from 2.7 to 8.1.*
- **CWE:** CWE-295 (Improper Certificate Validation), CWE-20 (Improper Input Validation), CWE-78 (OS Command Injection), CWE-394, CWE-392, CWE-754.
## Affected Systems
- **Products:** SINEC INS (Infrastructure Network Services)
- **Versions:** All versions < V1.0 SP2 Update 2
- **Configurations:** Systems configured with UMC (User Management Component) servers, RADIUS services, or those utilizing OpenSSL/libcurl components.
## Vulnerability Description
SINEC INS is affected by multiple flaws ranging from improper certificate validation to command injection. Key issues include:
- **Certificate Validation Issues:** Failure to validate UMC server certificates (CVE-2023-48427) allows for Man-in-the-Middle (MitM) attacks to steal credentials or escalate privileges.
- **Command Injection:** The RADIUS configuration mechanism fails to check uploaded certificates, allowing a malicious admin to execute system-level commands (CVE-2023-48428).
- **Denial of Service (DoS):** Several vulnerabilities allow attackers or malicious admins to crash the application webserver or REST API by sending crafted requests or exploiting OpenSSL's X.509 policy constraints.
- **Third-Party Flaws:** Inclusion of vulnerable versions of libcurl (connection reuse flaw) and OpenSSL.
## Exploitation
- **Status:** PoC Available (Exploitation Proof of Concept is indicated for all CVEs by the "E:P" CVSS vector string).
- **Complexity:** Low to High (Depending on the specific CVE; MitM attacks require High complexity, while API crashes are Low).
- **Attack Vector:** Network
## Impact
- **Confidentiality:** High (Credential theft and privilege escalation via MitM).
- **Integrity:** High (Unauthorized command execution and response manipulation).
- **Availability:** High (Application crashes and resource exhaustion/DoS).
## Remediation
### Patches
- **SINEC INS V1.0 SP2 Update 2:** Siemens recommends updating to this version or later immediately.
- **Download Link:** hxxps://support.industry.siemens.com/cs/ww/en/view/109825710/
### Workarounds
- **Access Control:** Restrict access to the application webserver to trusted users only.
- **Network Segmentation:** Implement Siemens' operational guidelines for industrial security to isolate affected devices.
## Detection
- **Indicators of Compromise:** Unusual administrative activity (unauthorized commands), frequent unexpected restarts of the SINEC INS webserver/REST API, or unauthorized certificates in the RADIUS/UMC configuration.
- **Detection Methods:** Monitor network traffic for unauthorized UMC server communication and audit system logs for "Unexpected Status Codes" or "Missing Report of Error Conditions."
## References
- **Siemens Advisory:** hxxps://cert-portal.siemens.com/productcert/html/ssa-077170.html
- **Siemens Industrial Security Guidelines:** hxxps://www.siemens.com/cert/operational-guidelines-industrial-security
- **General Security Contacts:** hxxps://www.siemens.com/cert/advisories