CVE-2002-0107 in CacheOS
Summary
by MITRE
Web administration interface in CacheFlow CacheOS 4.0.13 and earlier allows remote attackers to obtain sensitive information via a series of GET requests that do not end in with HTTP/1.0 or another version string, which causes the information to be leaked in the error message.
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Analysis
by VulDB Data Team • 12/24/2024
The vulnerability identified as CVE-2002-0107 affects the CacheFlow CacheOS 4.0.13 and earlier versions, specifically targeting the web administration interface component. This flaw represents a classic information disclosure vulnerability that stems from improper handling of HTTP protocol version strings in client requests. The vulnerability manifests when remote attackers submit GET requests that lack proper HTTP version specification, creating a scenario where the system responds with error messages containing sensitive system information. This represents a fundamental flaw in input validation and protocol handling within the web server implementation, allowing attackers to exploit the system's response mechanisms to extract confidential data.
The technical implementation of this vulnerability exploits the way the CacheFlow CacheOS web interface processes incoming HTTP requests. When a GET request is received without a proper HTTP version string such as HTTP/1.0 or HTTP/1.1, the system fails to properly validate the request format and instead generates an error response that inadvertently includes sensitive information about the system configuration, software versions, or internal system details. This behavior aligns with CWE-200, which describes improper output handling that results in information exposure, and demonstrates how protocol parsing errors can lead to unintended data leakage. The vulnerability specifically targets the HTTP request processing layer where the system should validate request format before generating responses, but instead falls back to error handling that exposes system internals.
The operational impact of this vulnerability is significant for organizations relying on CacheFlow CacheOS for network caching and content delivery services. Remote attackers can exploit this weakness to gather intelligence about the target system, potentially including version information, system architecture details, and other sensitive metadata that could inform subsequent attacks. This information disclosure vulnerability can serve as a stepping stone for more sophisticated attacks, as it provides attackers with knowledge about the system's configuration and implementation details that could be leveraged to identify additional vulnerabilities or craft more targeted exploits. The remote nature of this attack means that adversaries can probe systems from outside the network perimeter without requiring physical access or prior authentication credentials.
Organizations should implement immediate mitigations including updating to CacheFlow CacheOS versions that address this vulnerability, as well as implementing network-level controls to filter and validate HTTP requests before they reach the affected system. The solution involves ensuring that all HTTP requests are properly validated for protocol version specification and that error responses do not contain sensitive information about the system internals. This aligns with ATT&CK technique T1213.002, which involves data from information repositories, and emphasizes the importance of proper input validation and secure error handling practices. Additionally, organizations should consider implementing web application firewalls and intrusion detection systems that can monitor for suspicious HTTP request patterns and block malformed requests that could trigger the information disclosure behavior. The vulnerability highlights the critical importance of adhering to secure coding practices and proper protocol handling in web applications to prevent unintended information exposure through error responses.