Description

IBM Netezza Software 11.3.0.3 through Interim Fix 002 does not validate or improperly validates TLS certificate validation, which could allow an attacker to obtain sensitive information using man in the middle techniques.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-09-03T21:17:24.683Z",
  "pubdate": "2026-09-03T21:17:24.683Z",
  "executiveSummary": "This vulnerability involves an improper implementation of TLS certificate validation within IBM Netezza Software versions 11.3.0.3 through Interim Fix 002. The flaw resides in the handling of cryptographic handshake procedures, where the application fails to properly verify the authenticity of presented certificates during transit.\nThe primary impact of this deficiency is susceptibility to Man-in-the-Middle (MitM) attacks. An unauthorized actor positioned within the network path between the client and the Netezza server can intercept, inspect, or modify sensitive data traffic.\nBy bypassing certificate chain verification, the system cannot guarantee that it is communicating with a trusted endpoint. This facilitates the decryption of confidential sessions and the potential compromise of database credentials or administrative traffic.\nThe risk is categorized as high, as it requires no specific authentication to initiate the interception, provided the attacker has established a network vantage point to perform traffic redirection or ARP spoofing. Exploitation allows for the exfiltration of sensitive information, presenting a critical threat to data confidentiality and integrity across the Netezza enterprise environment.",
  "technicalDetails": "The root cause of this vulnerability lies in the software's TLS implementation, specifically the failure to enforce robust verification of the peer's certificate during the TLS handshake process. In standard secure communication protocols, a client must validate the server's certificate against a trusted Certificate Authority (CA) store, ensuring the common name (CN) or Subject Alternative Name (SAN) matches the target hostname and that the certificate is not expired or revoked.\nIn affected versions of IBM Netezza Software (11.3.0.3 through Interim Fix 002), the underlying TLS/SSL libraries fail to perform these mandatory checks. Consequently, the application will accept any certificate provided by a remote entity, regardless of whether the certificate is self-signed, improperly signed, or belongs to a malicious third party.\nThe attack flow for a successful compromise proceeds as follows: First, the attacker must achieve a network-level position capable of intercepting traffic between the Netezza client and the server. This is typically achieved via ARP spoofing, DNS poisoning, or control over a malicious upstream router. Once the attacker intercepts the connection initiation, they initiate a transparent proxy or a gateway that presents a fraudulent or spoofed certificate to the Netezza client. Because the client software does not properly validate the identity or validity of the certificate, it establishes an encrypted tunnel with the attacker's system rather than the legitimate Netezza server.\nWith the TLS tunnel established between the client and the attacker, the attacker then initiates a separate, valid connection to the legitimate Netezza server. The attacker functions as a transparent proxy, decrypting traffic from the client, logging or modifying data in plain text, and then re-encrypting it before forwarding it to the server. This method allows for the silent exfiltration of sensitive database queries, authentication tokens, and result sets without triggering any warnings on the client side.\nThe vulnerability exposes the network communication layer to active interception. No specialized privileges are required on the target server itself to perform this attack, as the flaw is inherent in the client-side validation logic. Post-exploitation, the attacker gains full visibility into the data streams, enabling the acquisition of sensitive information or the injection of malicious commands if the application protocol lacks additional application-layer integrity protections. This flaw bypasses the primary defensive mechanism intended to secure data in transit."
}