CVE-2026-67105 in BigFix Service Management
Summary
by MITRE • 10/01/2026
HCL BigFix Service Management is affected by an Insecure Communication vulnerability, which could allow an attacker with internal network access to intercept unencrypted HTTP traffic between backend services, enabling the extraction of sensitive data and potential man-in-the-middle (MitM) attacks.
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Analysis
by VulDB Data Team • 10/01/2026
The identified vulnerability in HCL BigFix Service Management represents a critical failure in securing inter-service communication within the application architecture. This flaw is classified as an Insecure Communication issue, specifically involving the use of unencrypted HTTP protocols for data transmission between backend components. By relying on plaintext HTTP rather than secure alternatives such as HTTPS with TLS encryption, the system fails to provide confidentiality and integrity protections for sensitive information exchanged during routine operations. This architectural oversight creates a significant attack surface that can be exploited by adversaries who have gained access to the internal network segment where these services reside.
From a technical perspective, the absence of transport layer security means that all data packets traversing between backend services are transmitted in clear text. An attacker positioned within this network environment can utilize standard packet sniffing tools or specialized interception frameworks to capture and analyze traffic flows. Because the communication is not encrypted, sensitive payloads such as authentication tokens, user credentials, configuration details, or proprietary business logic contained within API responses remain fully readable. This lack of encryption violates fundamental security principles regarding data protection in transit, allowing for straightforward extraction of information without requiring complex cryptographic attacks or key compromise.
The operational impact of this vulnerability is severe, primarily due to the potential for man-in-the-middle (MitM) attacks. Beyond simple eavesdropping, an attacker with sufficient privileges on the network can actively intercept and modify traffic between services. This capability enables session hijacking, where stolen authentication cookies or tokens are used to impersonate legitimate users or administrative accounts. It also allows for data tampering, where malicious actors could alter configuration settings or inject harmful commands into service interactions, potentially leading to unauthorized access, privilege escalation, or complete system compromise. The ability to manipulate unencrypted traffic undermines the integrity of the entire application stack, as downstream services may blindly trust modified inputs from upstream components.
This vulnerability aligns with CWE-319, which describes cleartext transmission of sensitive information over a network that is not protected against eavesdropping or tampering. Furthermore, it maps to MITRE ATT&CK techniques related to Network Sniffing (T1040) and Man-in-the-Middle Attacks (T1557). The exploitation path typically involves lateral movement within the internal network followed by passive monitoring or active interception of service-to-service calls. Organizations must recognize that even if perimeter defenses are robust, internal traffic between microservices or backend components remains exposed to insider threats or attackers who have breached outer layers of security.
To mitigate this risk, immediate remediation efforts should focus on enforcing encrypted communication channels across all inter-service connections. This involves configuring the affected services to use HTTPS with valid TLS certificates and ensuring that certificate validation is strictly enforced to prevent downgrade attacks. Network segmentation strategies should also be reviewed to limit which hosts can communicate directly with these backend services, reducing the number of potential interception points. Additionally, implementing mutual TLS (mTLS) would provide strong authentication for both client and server sides, ensuring that only authorized components can participate in the communication loop. Regular security audits and penetration testing focused on internal traffic flows are recommended to verify that encryption is consistently applied across all service interactions within the HCL BigFix Service Management environment.