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 unauthorized access.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.4",
  "pubDate": "2026-09-07T14:16:55.060Z",
  "pubdate": "2026-09-07T14:16:55.060Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 Appliance and Application versions are susceptible to an Improper Certificate Validation vulnerability. This security flaw stems from the failure of the application to properly verify the authenticity of SSL/TLS certificates during secure communications. An unauthenticated, remote attacker can exploit this vulnerability to conduct man-in-the-middle (MitM) attacks, intercept sensitive data, or impersonate trusted entities. The risk is significant as it compromises the confidentiality and integrity of communications between the SCG platform and external endpoints. Successful exploitation requires no prior authentication, allowing remote threat actors to position themselves within the network flow to observe or manipulate traffic. Affected versions include SCG 5.0 Appliance prior to 5.36.00.16 and SCG 5.0 Application prior to 5.36.00.00. Organizations deploying these versions are exposed to unauthorized access, potentially leading to the compromise of administrative sessions or data exfiltration. Remediation requires updating to the specified patched versions to ensure strict certificate chain verification is enforced.",
  "technicalDetails": "The vulnerability is identified as an Improper Certificate Validation flaw, which occurs when the Dell Secure Connect Gateway fails to perform adequate validation of the digital certificates presented by remote servers during TLS handshakes. In a secure network environment, an application must verify that the server certificate is signed by a trusted Certificate Authority (CA), check the expiration date, ensure the hostname matches the certificate's Subject Alternative Name (SAN), and confirm that the certificate has not been revoked.\nRoot Cause Analysis: The underlying issue resides in the application's transport layer implementation, where the TLS stack is configured to ignore or bypass critical certificate validation checks. This behavior often stems from the improper use of SSL/TLS libraries that allow for a 'trust all' or 'skip validation' configuration, or an incomplete implementation of the certificate verification callback functions. By failing to enforce these checks, the application becomes susceptible to spoofing and interception.\nExploitation Flow: An unauthenticated attacker positioned in a position to intercept network traffic (such as through ARP poisoning, DNS spoofing, or compromised network infrastructure) can initiate a man-in-the-middle (MitM) attack. When the Dell SCG attempts to connect to a remote service, the attacker intercepts the connection request. The attacker then presents a fraudulent or self-signed certificate to the SCG. Because the application logic fails to validate the certificate's chain of trust or identify the certificate as unauthorized, the SCG establishes an encrypted tunnel directly with the attacker. \nPost-Exploitation Impact: Once the encrypted tunnel is established with the attacker, the attacker gains full visibility into the traffic, including sensitive administrative credentials, authentication tokens, and potentially proprietary telemetry data transmitted by the gateway. The attacker can perform real-time manipulation of the data stream, effectively impersonating the legitimate service to the SCG or vice versa. This unauthorized access can lead to lateral movement within the network or the deployment of secondary payloads if the gateway interface itself contains further vulnerabilities reachable through the manipulated session. The lack of authentication required for this vector significantly increases the threat surface, as it removes the barrier for attackers to establish presence within the managed environment.\nAffected Components: The issue impacts the communication modules within Dell SCG 5.0 Appliance (versions < 5.36.00.16) and Dell SCG 5.0 Application (versions < 5.36.00.00) that manage outgoing connections to management consoles or remote support infrastructure."
}