CVE-2009-3591 in Dopewars
Summary
by MITRE
Dopewars 1.5.12 allows remote attackers to cause a denial of service (segmentation fault) via a REQUESTJET message with an invalid location.
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Analysis
by VulDB Data Team • 03/21/2025
The vulnerability identified as CVE-2009-3591 affects Dopewars version 1.5.12, a classic text-based drug dealing game that operates over network connections. This issue represents a classic buffer overflow or input validation flaw that can be exploited to crash the application through malformed network traffic. The specific trigger occurs when a malicious attacker sends a REQUESTJET message containing an invalid location parameter, which causes the application to experience a segmentation fault and subsequently terminate unexpectedly. This type of vulnerability falls under the category of denial of service attacks that target application stability and availability.
The technical flaw manifests in the application's network protocol handling mechanism where the Dopewars server fails to properly validate the location data within the REQUESTJET message. When processing this particular message type, the software does not implement adequate bounds checking or input sanitization for the location field, allowing an attacker to craft a specially formatted message that triggers memory access violations. The segmentation fault occurs because the application attempts to access memory at an invalid address when processing the malformed location parameter, causing the operating system to terminate the process. This vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and represents a classic example of improper input validation in network services.
The operational impact of this vulnerability extends beyond simple service disruption, as it can be exploited by remote attackers without requiring authentication or specialized privileges. An attacker can leverage this flaw to repeatedly crash the Dopewars server, effectively making it unavailable to legitimate users and disrupting the gaming experience. The nature of the attack makes it particularly dangerous in multi-user environments where the server might be hosting multiple concurrent games or serving numerous players. This vulnerability also demonstrates the importance of network protocol security, as it affects the fundamental communication layer that enables multiplayer functionality. From an attacker perspective, this represents a low-effort, high-impact method of service disruption that can be automated and scaled across multiple targets.
Mitigation strategies for CVE-2009-3591 should focus on implementing proper input validation and bounds checking within the application's network message handling routines. The most effective approach involves adding comprehensive validation for all location parameters within REQUESTJET messages, including length restrictions, character set validation, and memory boundary checks. Network administrators should also consider implementing firewall rules or intrusion detection systems that can identify and block malformed REQUESTJET messages before they reach the vulnerable application. Additionally, the software should be updated to a patched version that properly handles invalid location data without crashing. This vulnerability highlights the importance of defensive programming practices and adherence to secure coding standards that prevent memory corruption issues. The ATT&CK framework categorizes this as a denial of service technique under the T1499 subcategory, specifically targeting application availability through process termination. Organizations should also implement monitoring solutions to detect unusual patterns of service disruption that might indicate exploitation attempts.