CVE-2004-0315 in Voice
Summary
by MITRE
Buffer overflow in Avirt Voice 4.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long GET request on port 1080.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/13/2025
The vulnerability identified as CVE-2004-0315 represents a critical buffer overflow flaw within Avirt Voice 4.0 software that operates on TCP port 1080. This remote code execution vulnerability stems from inadequate input validation mechanisms within the application's handling of HTTP GET requests. The flaw occurs when the software processes malformed or excessively long GET parameters without proper bounds checking, leading to memory corruption that can result in system instability or complete application crash. This vulnerability specifically affects the voice communication software's web interface component that listens for incoming connections on the designated port.
The technical implementation of this buffer overflow exploit involves sending a specially crafted HTTP GET request containing an excessive amount of data to the target system's port 1080. When the Avirt Voice 4.0 application processes this malformed request, the insufficient buffer size validation causes the program to write data beyond the allocated memory boundaries. This memory corruption can overwrite critical program structures including return addresses, function pointers, or stack variables, potentially allowing remote attackers to manipulate program execution flow. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. According to ATT&CK framework, this represents a remote code execution technique that can be classified under T1203, which encompasses techniques for gaining code execution through network-based attacks.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable complete system compromise. When successfully exploited, the buffer overflow can cause the Avirt Voice 4.0 application to crash and terminate unexpectedly, resulting in service disruption for legitimate users. However, the more serious implications involve the potential for arbitrary code execution, which could allow attackers to gain unauthorized access to the system, escalate privileges, or establish persistent backdoors. The vulnerability affects systems where Avirt Voice 4.0 is deployed with default configurations, particularly in environments where the application is exposed to untrusted network traffic. Organizations using this software in production environments face significant risk of unauthorized access and potential data breaches. The vulnerability demonstrates the importance of proper input validation and memory management practices in network services, as highlighted by industry security standards that emphasize defensive programming techniques to prevent such memory corruption vulnerabilities.
Mitigation strategies for CVE-2004-0315 should focus on immediate patching of affected systems with vendor-provided security updates. Organizations should implement network segmentation to restrict access to port 1080, particularly by blocking external access to this service unless absolutely necessary. Network access control lists and firewall rules should be configured to limit connections to this specific port from trusted network segments only. Additionally, implementing intrusion detection systems that monitor for unusual GET request patterns or excessive data transfers can help identify potential exploitation attempts. System administrators should conduct comprehensive vulnerability assessments to identify all instances of Avirt Voice 4.0 installations and ensure proper patch management procedures are in place. The vulnerability serves as a reminder of the critical importance of regular security updates and the need for robust input validation mechanisms in all network-facing applications to prevent similar buffer overflow conditions that could lead to system compromise.