CVE-2006-6933 in Easy Chat Server
Summary
by MITRE
Easy Chat Server 2.1 stores sensitive information under the web root with insufficient access control, which allows remote attackers to download certain files via direct requests to files such as (1) ServerKey.pem and (2) AcceptIP.txt. NOTE: The provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 06/14/2025
The vulnerability identified as CVE-2006-6933 represents a critical security flaw in Easy Chat Server version 2.1 where sensitive cryptographic and configuration files are improperly stored within the web root directory without adequate access controls. This misconfiguration creates a significant attack surface that allows remote adversaries to directly access and download critical system files through simple HTTP requests. The affected files include ServerKey.pem, which contains the server's private cryptographic key, and AcceptIP.txt, which likely stores IP address filtering configurations. This vulnerability directly violates fundamental security principles of least privilege and proper file access control mechanisms that should prevent unauthorized access to sensitive system resources.
The technical implementation of this flaw stems from improper directory structure and access control configuration within the web server environment. When sensitive files are placed in the web root directory, they become directly accessible through standard HTTP protocols without requiring authentication or authorization checks. The ServerKey.pem file represents a particularly dangerous exposure since it contains cryptographic keys that could be used to impersonate the server, decrypt communications, or compromise the entire communication channel between clients and the chat server. The AcceptIP.txt file poses additional risk as it may contain network access control information that could be leveraged for further network reconnaissance or privilege escalation attacks.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attacks including man-in-the-middle attacks, credential theft, and service disruption. Remote attackers who discover these files can exploit the exposed cryptographic keys to establish fraudulent communications with legitimate clients, effectively breaking the security model of the chat server. The disclosure of IP filtering configurations could provide attackers with insights into network topology and access control policies, facilitating more targeted attacks. This vulnerability aligns with CWE-275 permissions issues and represents a classic example of insecure direct object references that fall under the ATT&CK technique of T1071.004 for application layer protocol and T1566 for credential access through network sniffing or key compromise.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The primary immediate fix involves moving sensitive files such as ServerKey.pem and AcceptIP.txt outside the web root directory and implementing proper access controls using web server configuration directives. Organizations should establish dedicated secure directories with restricted permissions and ensure that only authorized processes can access these sensitive files. Additionally, implementing proper file access controls through web server configuration, such as using .htaccess files or similar access control mechanisms, can prevent direct HTTP access to sensitive files. The solution should also include regular security audits to ensure that no sensitive information is inadvertently placed in publicly accessible directories. Organizations should consider implementing automated scanning tools to identify similar misconfigurations across their entire infrastructure, as this vulnerability pattern frequently occurs in legacy applications and improperly configured web environments.