CVE-2004-2594 in Quake II Server Windows
Summary
by MITRE
Absolute path traversal vulnerability in Quake II server before R1Q2 on Windows, as used in multiple products, allows remote attackers to read arbitrary files via a "\/" in a pathname argument, as demonstrated by "download \/server.cfg".
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Analysis
by VulDB Data Team • 07/19/2017
The CVE-2004-2594 vulnerability represents a critical absolute path traversal flaw affecting the Quake II server software prior to version R1Q2 on Windows systems. This vulnerability stems from inadequate input validation within the server's file handling mechanisms, specifically when processing pathname arguments that contain forward slash characters. The flaw enables remote attackers to bypass normal file access restrictions and retrieve arbitrary files from the server's filesystem, potentially exposing sensitive configuration data and system resources.
This vulnerability operates through a specific exploitation technique involving the manipulation of pathname arguments to include forward slash characters that are interpreted as absolute path indicators. The demonstration case of "download \/server.cfg" illustrates how an attacker can construct malicious requests that traverse the filesystem hierarchy to access protected configuration files such as server.cfg. The vulnerability is particularly dangerous because it allows attackers to read files that should normally be restricted, potentially exposing server credentials, network configurations, and other sensitive operational data.
The technical implementation of this flaw resides in the server's file resolution logic, which fails to properly sanitize or validate input containing forward slash characters in pathname arguments. When the server processes a request containing such malformed path specifications, it interprets the absolute path component and attempts to serve files from locations outside the intended directory structure. This represents a classic path traversal vulnerability that can be categorized under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. The vulnerability affects multiple products that utilize the Quake II server software, amplifying its potential impact across various gaming and network infrastructure deployments.
From an operational perspective, this vulnerability poses significant risks to gaming servers and network infrastructure that rely on Quake II server implementations. Attackers can exploit this flaw to access server configuration files, potentially discovering administrative credentials, network settings, and other sensitive information that could facilitate further attacks. The remote nature of the exploit means that attackers do not require local system access or physical presence to leverage this vulnerability, making it particularly attractive for automated exploitation campaigns. The impact extends beyond simple information disclosure, as access to server configuration files could enable attackers to modify server behavior, potentially leading to complete server compromise.
The vulnerability's exploitation aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to credential access and defense evasion. Attackers can use this vulnerability as an initial access vector to gather intelligence about server configurations and potentially escalate privileges through the exposure of sensitive files. The absolute path traversal mechanism also fits within techniques for bypassing security controls and accessing restricted resources, making it a valuable tool in the attacker's arsenal for reconnaissance and privilege escalation activities.
Mitigation strategies for CVE-2004-2594 focus on implementing proper input validation and sanitization mechanisms within the server's file handling processes. Organizations should ensure that all pathname arguments are properly validated to prevent the inclusion of absolute path indicators or other malicious path components. The recommended approach involves implementing strict path validation that rejects any input containing forward slash characters in positions that would enable absolute path traversal. Additionally, system administrators should upgrade to patched versions of the Quake II server software that address this specific vulnerability. Network segmentation and access controls can also help limit the potential impact of such vulnerabilities by restricting access to sensitive server components and implementing proper file access controls that prevent unauthorized file access even if the vulnerability is exploited.