CVE-2005-1702 in Warrior Kings
Summary
by MITRE
Format string vulnerability in Warrior Kings: Battles 1.23 and earlier and Warrior Kings 1.3 and earlier allows remote attackers to execute arbitrary code via format string specifiers in a nickname.
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Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2005-1702 represents a critical format string flaw affecting the Warrior Kings: Battles video game versions 1.23 and earlier, as well as version 1.3 and earlier. This type of vulnerability occurs when an application improperly handles user-supplied input in format string functions, creating opportunities for malicious exploitation. The specific context involves the game's nickname handling mechanism where user input is processed through format string functions without proper validation or sanitization. When a user enters a nickname containing format specifiers such as %s, %d, or %x, the game's code fails to treat this input as literal text, instead interpreting it as formatting directives that can access memory locations and potentially execute arbitrary code. This vulnerability falls under the CWE-134 classification for format string vulnerabilities, which is a well-documented weakness in software security that has been exploited in numerous applications over the years. The attack vector is particularly concerning as it allows remote attackers to exploit this vulnerability without requiring local system access, making it a significant threat in networked gaming environments where players connect to shared servers.
The technical execution of this vulnerability relies on the improper use of functions such as printf, sprintf, or similar format string handlers within the game's networking or user interface components. When the game processes a nickname containing malicious format specifiers, these directives can be used to read values from the stack, overwrite memory locations, or even redirect program execution flow. Attackers can craft specially formatted nicknames that when processed by the vulnerable game code, cause the application to read memory contents that may contain sensitive information or executable code pointers. The exploitation process typically involves understanding the memory layout of the target process and using format specifiers to manipulate the stack, potentially leading to privilege escalation or complete system compromise. This vulnerability aligns with the attack pattern described in the MITRE ATT&CK framework under the technique of code injection, specifically targeting the execution of arbitrary code through improper input handling. The root cause stems from the application's failure to properly validate and sanitize user input before using it in format string operations, a common oversight in game development where security considerations are often secondary to gameplay features.
The operational impact of this vulnerability extends beyond simple code execution, potentially compromising entire gaming sessions and server environments where multiple players interact. In multiplayer gaming scenarios, a malicious user could exploit this vulnerability to gain unauthorized access to server resources, manipulate game state, or even execute commands on the hosting machine. The vulnerability affects not only individual player experiences but also the integrity of online gaming communities and the security of gaming infrastructure. Game servers that rely on user nicknames for identification and communication protocols become particularly vulnerable, as attackers can use this flaw to gain persistent access or disrupt service for other players. The consequences include potential data breaches, unauthorized access to player information, and disruption of gaming services that depend on secure user authentication and identification. This vulnerability demonstrates the importance of input validation and proper error handling in networked applications, particularly in gaming environments where user-generated content is common and security controls may be insufficiently implemented. The threat is exacerbated by the fact that many gaming applications do not implement robust input sanitization measures, leaving them susceptible to various injection-based attacks that can be leveraged for broader system compromise.
Mitigation strategies for this vulnerability require immediate patching of affected game versions, with developers implementing proper input validation and sanitization mechanisms. The most effective approach involves modifying the game code to ensure that user nicknames are treated as literal strings when used in format string operations, rather than being interpreted as formatting directives. This can be achieved by using functions that explicitly handle string literals or by escaping format specifiers within user input before processing. Security updates should include comprehensive code reviews to identify similar vulnerabilities in other format string operations throughout the application. System administrators should monitor for exploitation attempts and consider implementing network-level controls to detect and prevent malicious nickname submissions. The remediation process should also include updating the game's user interface components to properly validate nickname length, character sets, and special character usage. Additionally, developers should implement proper error handling and logging mechanisms that can detect attempts to exploit format string vulnerabilities, providing early warning capabilities for potential security incidents. Organizations running gaming servers should establish security policies that require regular vulnerability assessments and patch management procedures to prevent exploitation of known vulnerabilities like CVE-2005-1702. The implementation of these mitigations aligns with industry best practices for secure software development and helps protect against similar vulnerabilities that may exist in other components of the gaming infrastructure.