CVE-2024-34033: Deltaww DIAEnergie Path Traversal Flaw

CVE-2024-34033 Overview

CVE-2024-34033 is a path traversal vulnerability affecting Delta Electronics DIAEnergie, an industrial energy management system. The flaw stems from insufficient input validation on file name parameters, allowing an authenticated attacker to write files outside the intended directory. If the specified file name matches an existing file on the file system, the original file is overwritten. The vulnerability is tracked under CWE-22 and is documented in CISA ICS Advisory ICSA-24-123-02.

Critical Impact
Authenticated remote attackers can overwrite arbitrary files on the DIAEnergie host, enabling code execution, system tampering, and disruption of industrial energy monitoring operations.

Affected Products

Delta Electronics DIAEnergie version 1.10.00.005
Prior DIAEnergie releases sharing the same vulnerable file-handling logic
Industrial control system (ICS) environments running the affected DIAEnergie build

Discovery Timeline

2024-05-03 - CVE-2024-34033 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-34033

Vulnerability Analysis

DIAEnergie exposes functionality that accepts a user-supplied file name and writes content to the file system. The application fails to canonicalize the supplied path or reject traversal sequences such as ../. An authenticated attacker with low privileges can supply crafted path segments to escape the intended write directory and place files anywhere the DIAEnergie service account can access.

Because the write operation overwrites existing files without validation, adversaries can replace application binaries, configuration files, scheduled task definitions, or web-accessible scripts. Overwriting an executable or DLL loaded by the DIAEnergie service converts the traversal primitive into remote code execution under the service context.

The attack is delivered over the network and requires no user interaction. Successful exploitation impacts confidentiality, integrity, and availability, since DIAEnergie manages energy data for industrial facilities and often integrates with SCADA and historian systems.

Root Cause

The root cause is missing input sanitization on file name parameters accepted by DIAEnergie's file-handling endpoints. The application concatenates user input directly into a file system path without normalizing separators, resolving .. sequences, or enforcing an allow-listed base directory.

Attack Vector

Exploitation requires network access to the DIAEnergie web interface and valid low-privileged credentials. The attacker submits a request containing a file name parameter with directory traversal sequences pointing outside the intended upload folder. The server writes the attacker-controlled content to the resolved path, overwriting the target file.

The vulnerability manifests in DIAEnergie's file write handlers. Detailed reproduction steps and vendor-specific endpoint identifiers are documented in the CISA ICS Advisory ICSA-24-123-02.

Detection Methods for CVE-2024-34033

Indicators of Compromise

HTTP requests to DIAEnergie endpoints containing ../, ..\, or URL-encoded traversal sequences (%2e%2e%2f) in file name parameters
Unexpected file modifications outside the DIAEnergie designated upload or working directories
New or overwritten executables, DLLs, or scripts in DIAEnergie install paths with recent timestamps
Web server or application log entries showing write operations to system directories from the DIAEnergie service account

Detection Strategies

Deploy web application firewall rules that inspect and block traversal patterns in POST bodies and query strings targeting DIAEnergie URIs
Implement file integrity monitoring on the DIAEnergie installation directory and adjacent system paths to alert on unauthorized changes
Correlate authenticated DIAEnergie session activity with file system write events on the host to identify anomalous writes outside expected directories

Monitoring Recommendations

Enable verbose HTTP request logging on the DIAEnergie web server, capturing full URI and body parameters for post-incident analysis
Monitor DIAEnergie service account for child process creation, since overwritten binaries would execute under that identity
Baseline normal file upload destinations and alert on writes to paths outside the baseline

How to Mitigate CVE-2024-34033

Immediate Actions Required

Apply the vendor patch referenced in CISA ICS Advisory ICSA-24-123-02 to all DIAEnergie installations
Restrict network access to DIAEnergie management interfaces to trusted operator networks and jump hosts only
Rotate all DIAEnergie user credentials, prioritizing accounts with file upload permissions
Audit the DIAEnergie installation directory and adjacent paths for unauthorized file modifications

Patch Information

Delta Electronics has published updated DIAEnergie builds addressing the input validation flaw. Refer to the vendor guidance linked in CISA ICS Advisory ICSA-24-123-02 for the fixed version and upgrade procedure. Verify the deployed DIAEnergie version after patching and confirm the vulnerable file-handling endpoint rejects traversal input.

Workarounds

Place DIAEnergie behind a reverse proxy that normalizes and validates request paths and rejects traversal sequences
Enforce network segmentation between DIAEnergie hosts and the broader corporate network, following ISA/IEC 62443 zone and conduit guidance
Remove or disable DIAEnergie accounts that do not require file upload capability
Run the DIAEnergie service under a least-privileged account with write access restricted to required directories

bash

# Example WAF rule pattern (ModSecurity) to block path traversal attempts
SecRule ARGS "@rx (\.\./|\.\.\\|%2e%2e%2f|%2e%2e/)" \
  "id:1003401,phase:2,deny,status:403,\
   msg:'DIAEnergie path traversal attempt (CVE-2024-34033)',\
   tag:'CVE-2024-34033'"