Description

IBM Common Licensing Agent 9.0, Agent 9.0.0.1, Agent 9.0.0.2, ART 9.0, ART 9.0.0.1, and ART 9.0.0.2 performs input validation exclusively on the client side and fails to enforce the same restrictions on the server side. An attacker can modify requests to bypass validation controls and submit unauthorized values, potentially resulting in unintended application behavior.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.2",
  "pubDate": "2026-09-14T19:17:16.563Z",
  "pubdate": "2026-09-14T19:17:16.563Z",
  "executiveSummary": "The identified vulnerability involves improper input validation in IBM Common Licensing Agent 9.0, 9.0.0.1, 9.0.0.2, and ART 9.0, 9.0.0.1, and 9.0.0.2.\nThe vulnerability originates from a reliance on client-side validation mechanisms to enforce security constraints, which fails to propagate those requirements to the server-side processing layer.\nBy bypassing the client-side interface, an attacker can submit malicious or unauthorized input directly to the server, resulting in potential integrity violations and unintended application behavior.\nThe risk implication is significant as it allows attackers to bypass security controls designed to restrict input parameters, potentially facilitating unauthorized actions or data manipulation within the licensing infrastructure.\nExploitation does not require advanced access but relies on the ability of the attacker to intercept, inspect, and modify network traffic or interact directly with server-side endpoints.\nThis vulnerability highlights a critical failure in the 'never trust the client' security paradigm, necessitating a remediation approach centered on robust server-side sanitization and validation logic.",
  "technicalDetails": "The root cause of this vulnerability is a flaw in the application's trust model, specifically the implementation of security-critical input validation exclusively within the client-side components of the IBM Common Licensing Agent and ART modules.\nIn a secure architecture, validation must occur at the trust boundary—the server. The current implementation permits the server-side backend to process requests without independently verifying the integrity, type, or range of the submitted data.\nThe exploitation flow involves the interception of communication between the client agent and the licensing server. An attacker can use proxy tools or custom scripts to craft arbitrary HTTP or proprietary protocol requests.\nBecause the server assumes the data has already been sanitized by the client-side UI or agent framework, it fails to perform secondary validation. Consequently, an attacker can bypass the client-side controls by sending requests that contain unauthorized values that would typically be rejected by the client's logic.\nThe vulnerable components reside within the server-side request processing logic of IBM Common Licensing Agent and ART, across versions 9.0, 9.0.0.1, and 9.0.0.2.\nBy manipulating parameters within these unauthorized requests, an attacker can influence the state of the licensing application, potentially leading to unauthorized license modifications, operational disruptions, or logic bypasses that impact the overall security posture of the licensing environment.\nThis vulnerability is particularly impactful because it effectively renders client-side security measures irrelevant. Since the server does not enforce constraints, it cannot differentiate between legitimate client-originated traffic and malicious, manually crafted traffic. This allows for the injection of values that may trigger unintended functions or bypass authorization checks that were intended to be enforced via the client-side configuration.\nFurthermore, the lack of server-side validation may extend the impact to backend database queries or internal application state management, where malformed input could lead to unexpected behavior in the handling of licensing tokens or entitlement parameters. There is no indication that the vulnerability requires specific authentication or privileged status to execute, assuming the attacker has reach to the listening server ports."
}