CVE-2004-2710 in Gyach Enhanced
Summary
by MITRE
Multiple buffer overflows in Gyach Enhanced (Gyach-E) before 1.0.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to (1) sending certain typing statuses or (2) setting the chat room status bar to the current chat room name.
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Analysis
by VulDB Data Team • 03/26/2019
The vulnerability identified as CVE-2004-2710 affects Gyach Enhanced (Gyach-E) versions prior to 1.0.3, representing a critical security flaw that exposes the application to remote exploitation. This vulnerability manifests through two distinct attack vectors involving improper input handling within the instant messaging client. The first vector involves sending specific typing status messages that trigger buffer overflow conditions, while the second vector occurs when setting the chat room status bar to display the current chat room name, both of which can lead to unpredictable application behavior and system compromise. These buffer overflow conditions represent fundamental flaws in the software's memory management practices, where insufficient bounds checking allows attackers to write data beyond allocated memory buffers, potentially corrupting adjacent memory regions and executing malicious code.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. The attack surface is particularly concerning as it allows remote code execution in addition to denial of service, making it a severe threat to system integrity. When an attacker crafts malicious input messages containing oversized data payloads, the application fails to validate input lengths against buffer capacities, leading to memory corruption. The specific nature of these buffer overflows suggests that Gyach-E's input processing routines lack proper bounds checking mechanisms, particularly in handling user-provided data that gets directly copied into fixed-size memory buffers without adequate validation. This vulnerability operates under the ATT&CK framework's technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute arbitrary commands on vulnerable systems through the compromised application process.
The operational impact of this vulnerability extends beyond simple service disruption, as it provides attackers with potential persistence mechanisms within networked environments where Gyach-E clients are deployed. The denial of service aspect can effectively disable communication channels, while the remote code execution capability allows attackers to gain unauthorized access to systems running vulnerable versions. In enterprise environments where instant messaging clients are commonly used for internal communications, this vulnerability could serve as an initial access point for broader network infiltration. The exploitation requires minimal privileges since the attack targets the application itself rather than requiring elevated system permissions, making it particularly dangerous in environments where users have standard privileges. The vulnerability affects the application's stability and reliability, potentially causing cascading failures in communication networks where multiple users depend on the service. Organizations with legacy systems using Gyach-E versions prior to 1.0.3 face significant risk, as the vulnerability remains exploitable and has been documented for over two decades, indicating the persistence of unpatched software in enterprise environments.
Mitigation strategies should focus on immediate patch deployment to version 1.0.3 or later, which addresses the buffer overflow conditions through proper input validation and bounds checking. Network administrators should implement monitoring for suspicious messaging patterns and consider network segmentation to limit the potential impact of successful exploitation attempts. The recommended remediation approach aligns with the principle of least privilege and defense in depth, as it addresses both the immediate vulnerability and provides additional layers of protection. Organizations should also conduct comprehensive vulnerability assessments to identify other legacy instant messaging clients that may contain similar buffer overflow conditions, as this represents a common class of vulnerabilities in older software implementations. Regular security updates and patch management processes become critical in preventing such vulnerabilities from remaining unaddressed for extended periods, as the longevity of this particular vulnerability demonstrates the importance of maintaining current software versions. System administrators should also consider implementing intrusion detection systems to monitor for exploitation attempts and establish incident response procedures specifically for handling remote code execution vulnerabilities in client applications.