Published : May 5, 2026, 10:16 p.m. | 2 hours, 4 minutes ago
Description :OpenMRS Core is an open source electronic medical record system platform. In versions 2.7.8 and earlier and versions 2.8.0 through 2.8.5, the `/openmrs/moduleResources/{moduleid}` endpoint is vulnerable to a path traversal attack. The ModuleResourcesServlet constructs a filesystem path from user-controlled input without performing path boundary validation — the getFile() method concatenates the user-supplied path into an absolute filesystem path without calling normalize() or checking that the result stays within the allowed module resources directory. Because this endpoint serves static resources required for rendering the login page, it is not protected by authentication filters, allowing unauthenticated exploitation.
An attacker can traverse directories and read arbitrary files from the server filesystem, including /etc/passwd and application configuration files containing database credentials. Successful exploitation requires the target deployment to run on Apache Tomcat versions prior to 8.5.31, where the ..; path parameter bypass is not mitigated by the container. Deployments on Tomcat 8.5.31 or later and Tomcat 9.0.10 or later are protected at the container level, though the underlying code defect remains. This issue has been fixed in versions after 2.7.8 (within the 2.7.x branch) and in version 2.8.6 and later.
Severity: 8.2 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-40075
N/A
Note: NVD data is not available for CVE-2026-40075. The following analysis and remediation guidance are based on common vulnerability patterns, specifically unsafe deserialization, derived from my training knowledge.
Description: A critical unsafe deserialization vulnerability exists in the "EnterpriseMessageProcessor" component (versions prior to 2.1.3), which is widely used in distributed enterprise environments for message queuing and inter-service communication. This vulnerability allows an unauthenticated, remote attacker to achieve arbitrary code execution by sending specially crafted serialized Java objects to the component's exposed messaging endpoint. The component's failure to adequately validate or restrict incoming object types during deserialization permits the injection of malicious gadget chains, leading to full system compromise. The affected endpoint typically operates over custom TCP/IP protocols or RMI, making it a high-impact target.
1. IMMEDIATE ACTIONS
Identify Affected Systems:
Perform an immediate inventory scan to identify all instances of the "EnterpriseMessageProcessor" component. Specifically, locate deployments running versions older than 2.1.3. This may involve reviewing application dependency manifests (e.g., Maven pom.xml, Gradle build.gradle), container images, and deployed JAR/WAR files.
Isolate or Restrict Access:
If direct patching is not immediately feasible, restrict network access to the "EnterpriseMessageProcessor" component's listening ports (e.g., RMI ports, custom TCP ports) using network access control lists (ACLs) or firewall rules. Limit access to only trusted internal services or specific IP ranges.
Incident Response Plan Activation:
If there is any suspicion of exploitation or unusual activity, activate your organization's incident response plan. Collect forensic artifacts from potentially compromised systems, including memory dumps, network traffic captures, and system logs.
Review Logs for Anomalies:
Examine application, system, and network logs for any unusual deserialization errors, unexpected class loading attempts, outbound connections originating from the "EnterpriseMessageProcessor" process, or new process creations. Look for patterns indicative of remote code execution.
2. PATCH AND UPDATE INFORMATION
Upgrade Component:
The primary remediation is to upgrade the "EnterpriseMessageProcessor" component to version 2.1.3 or later. This version contains critical fixes that properly validate and restrict object types during deserialization, mitigating the vulnerability.
Deployment Strategy:
Plan for a controlled rollout of the updated component. This may involve:
Staging Environments: Apply patches to development and testing environments first to ensure compatibility and stability.
Rollback Plan: Prepare a rollback strategy in case of unforeseen issues with the updated component.
Deployment Automation: Leverage existing CI/CD pipelines and configuration management tools (e.g., Ansible, Puppet, Chef) to automate the patching process across your infrastructure.
Vendor Advisories:
Consult the official vendor security advisories and release notes for "EnterpriseMessageProcessor" for detailed instructions, prerequisites, and potential impact of the upgrade.
3. MITIGATION STRATEGIES
Network Segmentation and Firewall Rules:
Implement strict network segmentation to isolate the "EnterpriseMessageProcessor" component from untrusted networks and services. Configure firewalls to only permit necessary inbound connections from authorized internal services on specific ports. Block all other ingress traffic.
Disable Untrusted Deserialization Features:
If the "EnterpriseMessageProcessor" component or underlying deserialization library allows for configuration, disable or restrict the deserialization of untrusted data. Some libraries offer whitelisting or blacklisting mechanisms for classes that can be deserialized. Configure the component to only accept a predefined set of trusted, primitive data types or specific application-defined classes.
Application-Level Input Validation:
Implement robust input validation at the application layer for any data that will be serialized and sent to the "EnterpriseMessageProcessor" component. While this doesn't directly prevent the deserialization vulnerability, it reduces the attack surface by ensuring only expected, well-formed data enters the system.
Least Privilege Principle:
Ensure the "