CVE-2006-6477 in First Response
Summary
by MITRE
FRAgent.exe in Mandiant First Response (MFR) before 1.1.1, when run in daemon mode and configured to use only HTTP, allows local users to modify requests and responses between a client and an agent by hijacking an HTTP FRAgent daemon and conducting a man-in-the-middle (MITM) attack.
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Analysis
by VulDB Data Team • 07/12/2019
The vulnerability identified as CVE-2006-6477 affects Mandiant First Response (MFR) version 1.1.0 and earlier, specifically targeting the FRAgent.exe component when operating in daemon mode with HTTP-only configuration. This security flaw represents a critical weakness in the communication protocol implementation that enables unauthorized modification of data flows between clients and agents. The vulnerability arises from insufficient cryptographic protection mechanisms within the HTTP communication channel, creating an exploitable condition that allows local attackers to intercept and manipulate network traffic without proper authentication or encryption. The issue stems from the absence of secure communication protocols such as HTTPS or TLS encryption, leaving the system susceptible to various forms of network-based attacks that compromise data integrity and confidentiality.
The technical implementation flaw resides in the FRAgent.exe daemon's handling of HTTP communications, where the system fails to establish secure channels for data transmission between client and server components. This configuration vulnerability creates a man-in-the-middle attack vector that enables local users to intercept, modify, or redirect HTTP requests and responses flowing through the agent daemon. The daemon mode operation further amplifies the risk by maintaining persistent network connections that can be targeted during active communication sessions. This weakness directly maps to CWE-319 - Cleartext Transmission of Sensitive Information, which specifically addresses the exposure of sensitive data through unencrypted communication channels. The vulnerability's exploitation requires local access to the system, making it particularly dangerous in environments where privileged accounts or administrative access might be compromised through other attack vectors.
The operational impact of this vulnerability extends beyond simple data interception, as it enables attackers to manipulate the entire communication flow between Mandiant agents and their clients. This capability allows for sophisticated attacks including data tampering, command injection, and potentially unauthorized access to sensitive forensic data that the MFR system is designed to protect. The compromised communication channel could enable attackers to alter forensic evidence, modify collection parameters, or even redirect data to malicious endpoints. Organizations utilizing Mandiant First Response for digital forensics and incident response operations face significant risks, as the integrity of forensic data becomes questionable when such vulnerabilities exist in the collection infrastructure. The vulnerability particularly affects environments where MFR is used for remote incident response or network forensics, where the integrity of collected evidence is paramount for legal proceedings and security investigations.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to secure the communication protocols. The primary recommendation involves upgrading to Mandiant First Response version 1.1.1 or later, which includes proper HTTPS support and secure communication mechanisms. Organizations should implement mandatory encryption for all agent-to-client communications, ensuring that HTTP traffic is either upgraded to HTTPS or completely disabled in favor of secure protocols. Network segmentation and monitoring should be implemented to detect unusual communication patterns that might indicate MITM activity. The implementation should also include proper certificate management and validation to prevent attackers from conducting successful man-in-the-middle attacks through certificate spoofing or trusted certificate injection. Security controls should be aligned with industry standards such as NIST SP 800-53 and ISO 27001, particularly focusing on secure communication protocols and data integrity measures. Additionally, regular security assessments and network traffic monitoring should be conducted to identify and remediate similar vulnerabilities in other components of the forensic investigation infrastructure.