CVE-2019-10247 in Data Integrator
Summary
by MITRE
In Eclipse Jetty version 7.x, 8.x, 9.2.27 and older, 9.3.26 and older, and 9.4.16 and older, the server running on any OS and Jetty version combination will reveal the configured fully qualified directory base resource location on the output of the 404 error for not finding a Context that matches the requested path. The default server behavior on jetty-distribution and jetty-home will include at the end of the Handler tree a DefaultHandler, which is responsible for reporting this 404 error, it presents the various configured contexts as HTML for users to click through to. This produced HTML includes output that contains the configured fully qualified directory base resource location for each context.
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Analysis
by VulDB Data Team • 07/08/2024
This vulnerability in Eclipse Jetty represents a sensitive information disclosure flaw that exposes critical system configuration details through improper error handling mechanisms. The vulnerability affects multiple versions of the Jetty web server including 7.x, 8.x, 9.2.27 and older, 9.3.26 and older, and 9.4.16 and older releases. When a client requests a path that does not match any configured context, the server generates a 404 error response that inadvertently reveals the fully qualified directory base resource location of all configured contexts. This occurs because the default server configuration includes a DefaultHandler component that operates at the end of the Handler tree, responsible for generating these error responses. The DefaultHandler's implementation constructs HTML output that displays available contexts, embedding the actual file system paths where these contexts are configured. This type of information disclosure vulnerability aligns with CWE-200, which specifically addresses the exposure of sensitive information through improper error handling and logging mechanisms. The vulnerability manifests across all operating systems where Jetty is deployed, making it particularly concerning for environments with diverse platform support requirements.
The technical flaw stems from the DefaultHandler's design decision to include absolute file system paths in its error page generation process. When the server encounters a request for a non-existent context path, the DefaultHandler attempts to provide a helpful navigation interface to available contexts, but this functionality inadvertently leaks sensitive directory structure information. The HTML output generated by this handler contains the fully qualified directory base resource locations, which can include system-specific paths, user directories, and potentially sensitive organizational structures. This exposure occurs because the handler does not properly sanitize or filter the context configuration data before incorporating it into the error response. From an operational perspective, this vulnerability creates significant risk for organizations as attackers can map the underlying file system structure of web applications, potentially identifying sensitive directories, application deployment patterns, and system configurations. The vulnerability directly impacts the principle of least privilege and information hiding, as it violates fundamental security practices that require minimal information disclosure in error responses.
The operational impact of this vulnerability extends beyond simple information disclosure, creating potential attack vectors for more sophisticated exploitation attempts. An attacker who discovers the exposed directory paths can use this information to plan targeted attacks against specific application components or to identify potential privilege escalation opportunities within the file system structure. The vulnerability creates a reconnaissance opportunity that aligns with ATT&CK technique T1213.002 for Data from Information Repositories, where attackers gather system information to inform their attack strategies. Organizations may inadvertently expose sensitive deployment information such as application server locations, backup directories, or configuration file locations that could be leveraged for further attacks. The vulnerability also impacts compliance requirements in regulated environments where information disclosure can violate standards such as PCI DSS, HIPAA, or SOX compliance frameworks that mandate protection of system configuration details. Additionally, this vulnerability can be exploited in conjunction with other weaknesses to create more severe security impacts, as the exposed paths may reveal application architecture patterns that could be used to bypass security controls or exploit other vulnerabilities.
Mitigation strategies for this vulnerability involve both immediate configuration changes and long-term architectural improvements. Organizations should immediately update to patched versions of Jetty that address this information disclosure issue, specifically versions newer than the affected releases mentioned in the CVE. Configuration modifications include disabling or customizing the DefaultHandler behavior to prevent path exposure in error responses, which can be achieved through custom error handling implementations or by modifying the handler chain. Security hardening measures should include implementing proper error page templates that do not contain sensitive directory information, and ensuring that error responses follow security best practices by limiting information disclosure. Organizations should also implement monitoring and alerting for unusual patterns of 404 requests that might indicate reconnaissance activity targeting this specific vulnerability. From a defensive perspective, this vulnerability highlights the importance of proper error handling design principles and demonstrates the need for security reviews of error response generation code. The remediation process should include comprehensive testing to ensure that error responses no longer expose sensitive system information while maintaining the functionality needed for legitimate user experience. Organizations should also consider implementing web application firewalls or security headers that can further restrict information disclosure patterns and provide additional layers of protection against similar vulnerabilities.