CVE-2026-67101 in BigFix Service Management
Summary
by MITRE • 09/18/2026
HCL BigFix Service Management is affected by a Server-Side Request Forgery (SSRF) vulnerability in its search functionality, which could allow an attacker to force the application server to send requests to internal systems that are not accessible from the internet.
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Analysis
by VulDB Data Team • 09/18/2026
The identified vulnerability represents a critical security flaw within HCL BigFix Service Management, specifically located in the application's search module. This Server-Side Request Forgery (SSRF) issue stems from insufficient validation of user-supplied input used to construct outbound HTTP requests. When an authenticated attacker interacts with the search functionality, they can manipulate parameters such as URLs or hostnames to direct the server to initiate connections toward internal network resources. These internal systems are typically isolated behind firewalls and not directly exposed to public internet traffic, relying on this architectural separation for security. By exploiting this flaw, a malicious actor bypasses these perimeter defenses by leveraging the trusted relationship between the application server and its backend infrastructure.
From a technical perspective, the root cause lies in the lack of rigorous input sanitization and URL validation mechanisms within the search endpoint. The application accepts user-provided strings without adequately verifying whether they point to internal IP ranges or private network addresses. This allows an attacker to craft requests that appear legitimate to the server but are intended for sensitive internal services such as database servers, administrative consoles, or other microservices running on localhost or specific subnets. The vulnerability aligns with CWE-918, which classifies Server-Side Request Forgery flaws where a web application fetches a remote resource without validating the user-provided URL. This misconfiguration enables the attacker to use the server as a proxy to probe internal network topology and access data that would otherwise remain inaccessible.
The operational impact of this vulnerability is severe due to its potential for lateral movement within the enterprise environment. An attacker who successfully exploits this SSRF can potentially read sensitive configuration files, extract database credentials, or interact with management interfaces on internal systems. In many deployments, BigFix Service Management integrates with various backend services that may have weaker security postures than the main application server. Consequently, compromising these internal endpoints could lead to unauthorized access to critical business data, disruption of service availability, or further escalation into other parts of the network infrastructure. The ability to force the server to make requests also facilitates port scanning and fingerprinting of internal assets, providing valuable intelligence for subsequent attack phases.
To mitigate this risk, organizations should implement strict input validation strategies that whitelist allowed domains and block access to private IP address ranges such as 10.x.x.x, 172.16.x.x through 172.31.x.x, and 192.168.x.x. Additionally, deploying a reverse proxy or web application firewall with SSRF protection rules can help filter malicious outbound requests before they reach the internal network. It is also advisable to restrict the BigFix Service Management server's ability to make external connections by default, allowing only necessary traffic through explicit allow-lists. Regular security assessments and code reviews focusing on URL handling logic are essential to prevent similar vulnerabilities from being introduced in future updates or customizations of the platform.