CVE-2024-46889 Overview
CVE-2024-46889 affects Siemens SINEC INS, a network management platform used to deploy and maintain industrial network services. All versions prior to V1.0 SP2 Update 3 embed hard-coded cryptographic key material used to obfuscate configuration files. An attacker who reverse engineers the application binary can extract this key and decrypt arbitrary backup files produced by the product.
The issue is tracked under CWE-321: Use of Hard-coded Cryptographic Key and is described in Siemens Security Advisory SSA-915275.
Critical Impact
Extraction of the embedded key allows offline decryption of SINEC INS backup files, exposing configuration data, credentials, and other sensitive operational information.
Affected Products
- Siemens SINEC INS – all versions before V1.0 SP2 Update 3
- Siemens SINEC INS V1.0, V1.0 SP1, V1.0 SP2
- Siemens SINEC INS V1.0 SP2 Update 1 and Update 2
Discovery Timeline
- 2024-11-12 - CVE-2024-46889 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-46889
Vulnerability Analysis
SINEC INS produces encrypted backup and configuration files to prevent trivial disclosure of the settings they contain. The encryption relies on cryptographic key material compiled directly into the application binary rather than derived from a user-supplied secret or a per-installation key.
Because the key is static across every deployment, any attacker who obtains a copy of the SINEC INS binary can recover it. Static analysis tools, string extraction, or a debugger reveal the constant. Once recovered, the key decrypts backups from any SINEC INS instance running an affected version.
The exposed configuration files typically contain service settings, network topology data, and account material used to administer connected industrial systems. Disclosure of these files supports further compromise of the managed network.
Root Cause
The root cause is the storage of long-lived symmetric key material inside the shipped binary [CWE-321]. Secure key management practices require per-installation or per-user key derivation, hardware-backed storage, or key wrapping tied to an operator-provided secret. None of these controls are present in affected versions.
Attack Vector
Exploitation requires access to a SINEC INS backup file and a copy of the application binary. The attack is offline: no interaction with a running SINEC INS instance is needed once both artifacts are available. An attacker with read access to backup storage, a stolen archive, or an exfiltrated copy from a compromised host can complete the full decryption workflow independently.
The vulnerability does not itself grant code execution or network access. It undermines the confidentiality of protected configuration data and can accelerate lateral movement when combined with other findings.
Detection Methods for CVE-2024-46889
Indicators of Compromise
- Unexpected reads or copies of SINEC INS backup files from configuration storage locations
- Transfer of SINEC INS installer or binary artifacts to unmanaged endpoints or external destinations
- Presence of SINEC INS backup archives on hosts that do not require them for operations
Detection Strategies
- Audit file access on servers hosting SINEC INS for reads of backup archives by non-administrative accounts
- Monitor for reverse engineering tooling (disassemblers, debuggers) executing against SINEC INS binaries on operator workstations
- Correlate backup file exfiltration with subsequent authentication attempts using credentials known to reside in SINEC INS configuration
Monitoring Recommendations
- Enable file integrity monitoring on SINEC INS installation directories and backup output paths
- Log and alert on outbound transfers of files matching SINEC INS backup naming conventions
- Track version inventory for SINEC INS deployments and flag any instance below V1.0 SP2 Update 3
How to Mitigate CVE-2024-46889
Immediate Actions Required
- Update SINEC INS to V1.0 SP2 Update 3 or later as directed by Siemens Security Advisory SSA-915275
- Restrict access to existing backup files and treat any backup produced by an affected version as potentially disclosed
- Rotate credentials, API keys, and shared secrets that were stored in SINEC INS configuration on affected versions
Patch Information
Siemens has released SINEC INS V1.0 SP2 Update 3, which addresses the hard-coded key issue. Refer to Siemens ProductCERT advisory SSA-915275 for the fixed release and download instructions.
Workarounds
- Store SINEC INS backup files on encrypted volumes with access limited to administrators of the platform
- Transfer backups only over authenticated, encrypted channels and avoid retaining copies on general-purpose file shares
- Segment SINEC INS management hosts from general IT networks to reduce the chance of binary and backup exfiltration
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
