CVE-2004-2599 in Quake II Server
Summary
by MITRE
Multiple buffer overflows in Quake II server before R1Q2, as used in multiple products, allow local users to cause a denial of service (application crash) via the server console or rcon.
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Analysis
by VulDB Data Team • 03/26/2019
The vulnerability identified as CVE-2004-2599 represents a critical security flaw affecting Quake II server implementations prior to version R1Q2. This issue manifests as multiple buffer overflows that can be exploited by local users to trigger denial of service conditions. The vulnerability specifically targets the server console and remote console functionality, making it particularly dangerous in multiplayer gaming environments where server stability is paramount. The affected implementations span multiple products that utilize Quake II server technology, indicating a widespread impact across various gaming platforms and networked applications.
The technical root cause of this vulnerability lies in improper input validation within the Quake II server console handling mechanisms. When local users provide malicious input to the server console or rcon commands, the system fails to properly bounds-check buffer allocations, leading to memory corruption that results in application crashes. This buffer overflow condition occurs because the server software does not adequately validate the length of input data before copying it into fixed-size buffers. The flaw can be categorized under CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios that may occur during dynamic memory allocation. These buffer overflows represent a fundamental weakness in the software's memory management practices and input sanitization protocols.
The operational impact of this vulnerability extends beyond simple service disruption, as it can severely compromise the gaming experience and network stability for legitimate users. In multiplayer gaming environments, the denial of service condition can result in server crashes that affect hundreds or thousands of concurrent players, potentially disrupting entire gaming sessions and community interactions. The vulnerability's local user requirement means that attackers must already have access to the system or network to exploit it, but this access can be gained through various means including social engineering, compromised accounts, or insider threats. The attack vector through server console and rcon interfaces makes this particularly concerning for game administrators and network operators who rely on these control mechanisms for server management and player moderation.
From a cybersecurity perspective, this vulnerability demonstrates the importance of robust input validation and memory safety practices in server applications. The ATT&CK framework categorizes this type of vulnerability under T1499, which covers network denial of service attacks, and T1068, which addresses local privilege escalation techniques. Organizations should implement comprehensive security measures including regular software updates, input validation controls, and monitoring systems to detect anomalous console activity. The vulnerability highlights the necessity of adhering to secure coding practices such as those recommended in the CERT/CC Secure Coding Standards, particularly guidelines related to buffer management and input validation. System administrators should ensure that all Quake II server implementations are updated to versions that address this vulnerability, and consider implementing additional access controls and logging mechanisms to detect potential exploitation attempts. The widespread nature of affected products suggests that organizations running these legacy systems should conduct thorough security assessments and implement compensating controls to mitigate the risk of exploitation.