Description

Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to protection mechanism bypass.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.9",
  "pubDate": "2026-09-09T14:17:17.033Z",
  "pubdate": "2026-09-09T14:17:17.033Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 is susceptible to an Improper Certificate Validation vulnerability due to failures in verifying the authenticity of presented certificates during cryptographic handshake procedures.\nThis vulnerability exists within the SCG Appliance (versions prior to 5.36.00.16) and the SCG Application (versions prior to 5.36.00.00).\nThe flaw allows an unauthenticated remote attacker to intercept or impersonate encrypted communication channels, effectively bypassing security controls that rely on Transport Layer Security (TLS) or similar certificate-based trust mechanisms.\nThe primary risk involves a complete breakdown of data confidentiality and integrity for sessions handled by the affected software. By exploiting this weakness, an attacker can conduct man-in-the-middle (MitM) attacks, potentially gaining unauthorized access to sensitive management data, credentials, or administrative commands.\nThe vulnerability requires no authentication and can be triggered via network-accessible vectors, making it a critical concern for environments relying on SCG for secure backend connectivity and appliance orchestration.",
  "technicalDetails": "The root cause of this vulnerability lies in the improper implementation of X.509 certificate validation logic within the Dell Secure Connect Gateway (SCG) communication stack. When the application or appliance initializes an outbound connection or validates an incoming request, the validation module fails to perform essential checks—such as verifying the certificate authority (CA) chain, checking expiration dates, or ensuring that the certificate's subject alternative name (SAN) or common name (CN) matches the expected service identity.\nThe vulnerability manifests during the TLS/SSL handshake process. Because the application logic accepts improperly signed, forged, or expired certificates without raising an error or terminating the connection, an attacker positioned in a man-in-the-middle capacity can present a malicious certificate to the SCG instance. The application, failing to enforce strict validation, will proceed to establish the encrypted tunnel with the attacker's endpoint, treating it as a trusted entity.\nFrom an attack flow perspective, an unauthenticated remote attacker monitors network traffic destined for the SCG appliance. Once the target initiates a connection, the attacker intercepts the request and injects their own crafted certificate. Since the software does not properly cross-reference the certificate against known trusted stores or perform identity verification, the handshake concludes successfully. Once the session is established, the attacker can decrypt, inspect, and potentially modify the traffic in transit, effectively bypassing the security controls intended to protect the appliance's management and telemetry data.\nThe scope of impact extends to the compromise of data integrity and confidentiality. By manipulating the communication stream, an attacker could inject unauthorized commands or intercept sensitive diagnostic data transmitted between the SCG and Dell backend services. The exploit does not require prior knowledge of legitimate credentials, as it subverts the trust architecture of the transport layer itself. Furthermore, this bypass mechanism facilitates advanced persistent threats by providing an avenue for command-and-control (C2) communication via the appliance, leveraging the trusted status SCG holds within the enterprise network infrastructure.\nThis flaw affects Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and SCG 5.0 Application versions prior to 5.36.00.00, necessitating an immediate upgrade to the respective patched versions to enforce proper cryptographic verification standards."
}