Description

HCL AION is affected by a vulnerability where the HTTP Strict-Transport-Security (HSTS) header was missing or insecurely configured, so browsers were not instructed to always use HTTPS. This may allow connections to be downgraded or intercepted, potentially resulting in unintended behavior or security impact under certain conditions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "3.7",
  "pubDate": "2026-11-06T13:17:30.600Z",
  "pubdate": "2026-11-06T13:17:30.600Z",
  "executiveSummary": "HCL AION is susceptible to a security misconfiguration regarding the HTTP Strict-Transport-Security (HSTS) header. The absence or improper implementation of this security policy fails to enforce encrypted HTTPS connections between the client browser and the server, thereby exposing communications to potential downgrades or interception.\nThis vulnerability is classified as a lack of transport layer security enforcement. The primary risk involves Man-in-the-Middle (MitM) attacks, where an adversary can intercept traffic or force a downgrade to plaintext HTTP. Successful exploitation allows for the compromise of data in transit, including sensitive authentication tokens or user credentials.\nThe vulnerability affects HCL AION instances where security header policies are not explicitly defined or enforced. There are no specific authentication or privilege requirements for an attacker to initiate a downgrade attack; the threat exists due to the network-level interaction between the client and the vulnerable server. Organizations relying on HCL AION must ensure that transport security policies are strictly implemented to maintain the integrity and confidentiality of web sessions.",
  "technicalDetails": "The root cause of this vulnerability lies in the server's failure to emit the 'Strict-Transport-Security' HTTP response header. HSTS is a critical security mechanism that forces browsers to interact with a web server exclusively over HTTPS for a defined duration. Without this directive, the browser assumes the connection is not permanently pinned to TLS, allowing for protocol downgrades.\nThe attack flow initiates when a user attempts to access an HCL AION resource. In the absence of an HSTS policy, an attacker positioned as a Man-in-the-Middle (MitM) can intercept the initial request. By sending a spoofed HTTP response or altering the destination link to an unencrypted version of the service, the attacker effectively strips away the security provided by TLS. This maneuver forces the client browser to communicate via plaintext HTTP, rendering all traffic visible and modifiable by the attacker.\nDuring this intercepted session, the attacker can perform SSL stripping, where the attacker maintains an HTTPS connection with the legitimate HCL AION server while communicating via HTTP with the victim client. Consequently, any credentials, session identifiers (e.g., cookies), or sensitive metadata transmitted by the user are intercepted in plaintext. This exposure occurs regardless of whether the user intentionally navigates to an HTTP URL or is redirected there by the attacker.\nThe vulnerable component is the HTTP response handling logic within the HCL AION web server configuration. Because the server does not enforce HSTS, it fails to instruct browsers to prevent insecure connection attempts. The lack of this header prevents the enforcement of 'includeSubDomains' or 'preload' directives, which would otherwise harden the domain against cross-site request forgery and cookie-theft variants that rely on insecure protocol usage.\nPost-exploitation impact includes the full compromise of the user's session. An attacker may hijack authenticated sessions, gain access to application-specific functions, or inject malicious content into the web traffic if the server fails to implement sufficient Content Security Policy (CSP) headers in conjunction with transport security. Given that this vulnerability exists at the protocol level, it remains a persistent threat to any user traversing untrusted networks to access the HCL AION interface."
}