CVE-2007-3788 in InstaGate EX2 UTM
Summary
by MITRE
The eSoft InstaGate EX2 UTM device stores the admin password within the settings HTML document, which might allow context-dependent attackers to obtain sensitive information by reading this document.
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Analysis
by VulDB Data Team • 10/27/2017
The CVE-2007-3788 vulnerability affects the eSoft InstaGate EX2 Unified Threat Management device, representing a critical information disclosure flaw that exposes administrative credentials through improper configuration management. This vulnerability stems from the device's insecure handling of administrative passwords within its web interface configuration files, specifically within HTML documents that contain sensitive authentication information. The flaw demonstrates a fundamental weakness in the device's security architecture where privileged credentials are stored in plaintext within accessible web resources rather than being properly secured through cryptographic means or access controls.
The technical implementation of this vulnerability involves the device's web server configuration where administrative passwords are embedded directly into HTML settings documents without adequate protection mechanisms. Attackers can exploit this by simply accessing the relevant HTML document through the web interface, thereby bypassing normal authentication procedures and gaining immediate administrative access to the device. This represents a classic case of insecure storage of sensitive information, where the password is not only stored in plaintext but also made available through unauthenticated access points within the device's web interface. The vulnerability directly relates to CWE-312, which addresses the exposure of sensitive information through improper data handling, and more specifically to CWE-522, concerning insufficiently protected credentials.
The operational impact of this vulnerability extends beyond simple credential theft, as it enables full administrative control over the Unified Threat Management device. An attacker with access to the vulnerable HTML document can not only obtain the administrative password but also potentially gain access to network configuration settings, firewall rules, intrusion detection configurations, and other critical system parameters. This access level allows for complete network compromise through the device, enabling man-in-the-middle attacks, traffic interception, and modification of security policies that protect the network infrastructure. The vulnerability creates a persistent backdoor that remains active until the device is properly patched or reconfigured, making it particularly dangerous in enterprise environments where UTM devices serve as critical security gateways.
Mitigation strategies for CVE-2007-3788 should focus on immediate remediation through firmware updates provided by eSoft, as well as implementing network segmentation to limit access to the device's web interface. Organizations should enforce strict access controls using network access control lists that restrict access to the UTM device to authorized personnel only, and implement network monitoring to detect unauthorized access attempts. The vulnerability also highlights the importance of secure configuration management practices, where administrative credentials should never be stored in plaintext within web-accessible files. Additional protective measures include implementing network intrusion detection systems to monitor for access attempts to sensitive configuration files and establishing regular security audits to identify similar misconfigurations. From an ATT&CK framework perspective, this vulnerability maps to T1566 for credential access through unauthorized access to system files and T1071 for application layer protocol usage in accessing web interfaces. Organizations should also consider implementing principle of least privilege access controls and regularly review device configurations to ensure that sensitive information is not exposed through web interface documents.