Description

Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in CONPROSYS PAC Series. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker who can log in to the product.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-09-14T07:17:19.247Z",
  "pubdate": "2026-09-14T07:17:19.247Z",
  "executiveSummary": "The CONPROSYS PAC Series is susceptible to an OS command injection vulnerability categorized under CWE-78: Improper Neutralization of Special Elements used in an OS Command.\nThis vulnerability allows an authenticated attacker to execute arbitrary OS commands on the underlying system, leading to a complete compromise of the device's integrity and availability.\nThe flaw stems from insufficient input sanitization where user-supplied data is concatenated into system-level shell commands without proper validation or escaping mechanisms.\nExploitation requires the attacker to possess valid login credentials for the product. Once authenticated, the attacker can leverage the command injection to perform unauthorized operations, modify system configurations, or deploy persistent malicious payloads.\nThe risk is significant as it provides a pathway for an attacker to gain elevated privileges or move laterally within the operational network. Remediation requires strict input filtering and adherence to secure coding practices to ensure that user inputs are not interpreted as executable shell instructions.",
  "technicalDetails": "The vulnerability in the CONPROSYS PAC Series is rooted in the unsafe handling of user-provided input by the application's backend processes. When the application passes this untrusted input to system-level interfaces or shell execution functions without proper neutralization, special characters such as semicolons, pipes, or ampersands can be used to terminate the intended command and append malicious OS-level instructions.\nThe attack flow requires the adversary to reach a specific authenticated interface within the product that invokes system-level commands. By injecting platform-specific command separators into input fields or parameters, the attacker effectively breaks the command logic and forces the operating system shell to execute the attacker-supplied payload with the same privileges as the application process.\nBecause the application performs these operations via the underlying OS shell, the payload is executed immediately upon the processing of the malicious request. This allows for a wide range of post-exploitation activities, including directory traversal, remote code execution, installation of backdoors, or the modification of sensitive configuration files that manage the PAC's operational environment.\nSince the vulnerability requires prior authentication, the initial barrier to entry is the valid login process. However, once established, the security model is bypassed because the application lacks a secure API or sandbox environment to contain the execution of shell commands. The absence of robust input validation or the use of parameterized interfaces exacerbates the issue, allowing even simple shell metacharacters to trigger unintended code execution.\nThe impact of a successful exploit is comprehensive. An attacker can gain full administrative control over the affected device, potentially leading to unauthorized data access, disruption of industrial control processes, or the use of the device as a pivot point to perform further attacks on connected industrial networks. Mitigation requires the implementation of strict allow-listing for inputs and the transition toward the use of APIs that prevent shell invocation entirely."
}