CVE-2007-1502 in Rhapsody IRC
Summary
by MITRE
Multiple buffer overflows in Rhapsody IRC 0.28b allow remote attackers to execute arbitrary code via a (1) long command, (2) long server argument to the (a) connect or (b) server commands, (3) long nick argument to the (c) nick command, or a long (4) nick or (5) message argument to the (d) ctcp, (e) chat, (f) notice, (g) message (msg), or (h) query commands.
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Analysis
by VulDB Data Team • 10/09/2017
The vulnerability identified as CVE-2007-1502 represents a critical buffer overflow issue within Rhapsody IRC client version 0.28b, specifically affecting multiple command processing functions that handle user input without proper bounds checking. This flaw exists in the client's handling of various IRC commands including connect, server, nick, ctcp, chat, notice, message, and query operations, making it a widespread security concern that could be exploited by remote attackers to gain unauthorized control over affected systems. The vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-provided data before processing, creating opportunities for malicious input to overwrite adjacent memory locations.
The technical implementation of this vulnerability manifests through multiple attack vectors that exploit different command handlers within the IRC client. When processing a long command string, the application fails to validate the length of input data against allocated buffer sizes, allowing attackers to overflow memory buffers and potentially overwrite critical program execution structures such as return addresses or function pointers. The specific command arguments that trigger these buffer overflows include server arguments in connect and server commands, nick arguments in nick command, and both nick and message arguments in ctcp, chat, notice, message, and query commands. This multi-vector approach significantly increases the attack surface and exploitation potential compared to single-point vulnerabilities.
The operational impact of CVE-2007-1502 extends beyond simple denial of service scenarios, as successful exploitation could lead to complete system compromise through arbitrary code execution. Attackers could leverage these buffer overflows to inject and execute malicious code within the context of the IRC client process, potentially gaining elevated privileges or establishing persistent backdoors on compromised systems. The vulnerability particularly affects systems where users interact with potentially malicious IRC servers or when users receive crafted messages from other IRC clients, making it a significant concern for network administrators managing IRC infrastructure and users who engage in IRC communications. This type of vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of how improper input validation can lead to privilege escalation and remote code execution.
Mitigation strategies for this vulnerability require immediate patching of the affected Rhapsody IRC client version 0.28b, as the original vendor likely released security updates addressing these buffer overflow conditions through proper input length validation and bounds checking mechanisms. System administrators should implement network segmentation and access controls to limit exposure to potentially malicious IRC traffic, while also monitoring for suspicious network activity that might indicate exploitation attempts. The vulnerability demonstrates the importance of proper software security practices including input validation, memory management, and regular security updates as outlined in the ATT&CK framework's software exploitation techniques. Organizations should also consider implementing network-based intrusion detection systems to monitor for patterns consistent with buffer overflow exploitation attempts, particularly those targeting IRC protocols and common client applications that may be vulnerable to similar memory corruption issues.