CVE-2003-1269 in AN-HTTPd
Summary
by MITRE
AN HTTP 1.41e allows remote attackers to obtain the root web server path via an HTTP request with a long argument to a script, which leaks the path in an error message.
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Analysis
by VulDB Data Team • 07/14/2025
The vulnerability described in CVE-2003-1269 represents a classic information disclosure flaw that existed in early web server implementations. This vulnerability specifically affects HTTP 1.41e servers and demonstrates how improper error handling can lead to sensitive system information exposure. The flaw manifests when a remote attacker crafts a malicious HTTP request containing an excessively long argument to a server-side script, causing the server to generate an error message that inadvertently reveals the root web server path. This type of vulnerability falls under the category of information disclosure attacks where attackers can gain knowledge about the underlying system structure without direct authentication or authorization.
The technical implementation of this vulnerability stems from inadequate input validation and error message generation within the web server software. When the server processes a request with an overly long argument, it fails to properly sanitize or truncate the input before generating an error response. The error message construction process in the affected HTTP 1.41e implementation does not adequately filter or limit the display of path information, allowing the complete root web server path to be exposed in the error output. This behavior aligns with CWE-209, which describes improper error handling that reveals internal implementation details, and represents a fundamental flaw in the server's defensive programming practices. The vulnerability specifically exploits the server's inability to properly handle malformed input parameters and translates this weakness into actionable intelligence for potential attackers.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with critical path information that can be leveraged for subsequent attacks. Once an attacker obtains the root web server path, they can use this knowledge to plan more sophisticated attacks including directory traversal attempts, file inclusion exploits, or targeted attacks against specific server components. The exposure of the web server root path creates a foundation for further reconnaissance activities and can significantly reduce the attack surface complexity for malicious actors. From an attacker's perspective, this information can be used to map the server's directory structure, identify potential vulnerable scripts, and craft more effective attack payloads. The vulnerability also demonstrates how seemingly minor implementation flaws can have substantial security implications, particularly when they occur in the error handling pathways of server software.
Mitigation strategies for CVE-2003-1269 should focus on implementing proper input validation and error handling mechanisms within the web server software. The most effective approach involves configuring the server to truncate or sanitize input parameters before processing them, ensuring that error messages do not contain sensitive path information. Organizations should implement comprehensive logging and monitoring systems to detect unusual request patterns that might indicate exploitation attempts. The implementation of proper error handling practices, including the use of generic error messages that do not reveal internal system information, should be prioritized. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other server components. This vulnerability highlights the importance of following secure coding practices and adhering to standards such as the OWASP Top Ten, which emphasizes the need for proper error handling and input validation to prevent information disclosure attacks. The remediation process should also include updating to newer versions of the HTTP server software where these issues have been addressed through improved input validation and error handling mechanisms.