CVE-2010-10012 in httpdasm
Summary
by MITRE • 07/23/2025
A path traversal vulnerability exists in httpdasm version 0.92, a lightweight Windows HTTP server, that allows unauthenticated attackers to read arbitrary files on the host system. By sending a specially crafted GET request containing a sequence of URL-encoded backslashes and directory traversal patterns, an attacker can escape the web root and access sensitive files outside of the intended directory.
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Analysis
by VulDB Data Team • 07/23/2025
The vulnerability identified as CVE-2010-10012 represents a critical path traversal flaw in httpdasm version 0.92, a lightweight Windows HTTP server implementation that was widely used for basic web serving functions. This vulnerability falls under the category of improper input validation and specifically manifests as a failure to properly sanitize user-supplied URI parameters before processing file requests. The affected software does not adequately validate or normalize path components in incoming HTTP requests, creating an opportunity for malicious actors to manipulate the file access mechanism through crafted HTTP GET requests. The vulnerability is particularly concerning as it affects a Windows-specific HTTP server implementation that was commonly deployed in environments where lightweight web services were required without the full complexity of enterprise solutions.
The technical exploitation of this vulnerability relies on the manipulation of URL-encoded backslashes and directory traversal sequences that allow an attacker to escape the designated web root directory. When httpdasm processes a request containing sequences such as "../" or encoded backslash patterns, the server fails to properly resolve these paths, resulting in the traversal outside of the intended document root. This flaw stems from inadequate path normalization and validation mechanisms within the server's file access routines, where the application does not properly sanitize the request parameters or enforce strict directory boundaries. The vulnerability is classified as CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. Attackers can leverage this weakness to access sensitive system files, configuration data, or other resources that should remain protected from unauthorized access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to gain access to critical system files and potentially sensitive data stored on the affected server. An unauthenticated attacker can exploit this vulnerability to read arbitrary files on the host system, including but not limited to configuration files, log files, and potentially system credentials or database connection strings. The implications are particularly severe in environments where the httpdasm server is used to serve content that includes sensitive information or where the server operates with elevated privileges. The vulnerability demonstrates a fundamental flaw in the server's security architecture, as it allows an attacker to bypass normal access controls and potentially escalate their privileges further by accessing system files or configuration data that could reveal additional attack vectors. This type of vulnerability is often categorized under the MITRE ATT&CK framework as part of the privilege escalation and credential access tactics, where adversaries seek to gain unauthorized access to system resources.
The mitigation strategies for this vulnerability primarily focus on immediate patching and implementation of proper input validation mechanisms. Organizations should upgrade to a patched version of httpdasm or migrate to more secure and actively maintained HTTP server implementations such as IIS, Apache, or nginx, which have robust path validation and security features. Additionally, implementing proper input sanitization at the application level, including the validation of all URI components and the enforcement of strict directory boundaries, can prevent similar vulnerabilities from being exploited. Network-level protections such as web application firewalls and intrusion detection systems can also help detect and block malicious requests containing directory traversal patterns. The vulnerability serves as a reminder of the critical importance of proper input validation and the need for security-conscious development practices, particularly when implementing lightweight server solutions that may not include comprehensive security features by default. Organizations should also implement regular security assessments and vulnerability scanning to identify and remediate similar issues in their deployed software environments.