CVE-2013-3563 in Lianja SQL Server
Summary
by MITRE
Stack-based buffer overflow in db_netserver in Lianja SQL Server before 1.0.0RC5.2 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a crafted string to TCP port 8001.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/23/2025
The vulnerability identified as CVE-2013-3563 represents a critical stack-based buffer overflow flaw within the db_netserver component of Lianja SQL Server versions prior to 1.0.0RC5.2. This vulnerability resides in the network server functionality that handles incoming connections on TCP port 8001, making it a significant concern for database administrators and security professionals managing systems that utilize this software. The flaw stems from inadequate input validation mechanisms that fail to properly check the length of incoming data streams before copying them into fixed-size stack buffers, creating an exploitable condition that can be leveraged by remote attackers to compromise system integrity.
The technical nature of this vulnerability aligns with CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. When a maliciously crafted string is transmitted to the vulnerable TCP port 8001, the db_netserver component processes this input without adequate length verification, leading to memory corruption that can result in either daemon crash or more severe arbitrary code execution. The stack-based nature of the overflow means that the attacker can potentially overwrite return addresses, function pointers, and other critical stack data structures, enabling them to redirect program execution flow.
From an operational impact perspective, this vulnerability creates substantial risk for organizations relying on Lianja SQL Server for database operations, as it provides remote attackers with the capability to perform both denial of service attacks that can disrupt database services and potentially execute malicious code on affected systems. The vulnerability's remote exploitability means that attackers do not need physical access to the system, significantly expanding the attack surface and making it particularly dangerous in networked environments where database servers are exposed to external traffic. The potential for arbitrary code execution elevates this from a simple service disruption to a full system compromise scenario that could result in data theft, privilege escalation, or further network infiltration.
The exploitation of this vulnerability can be mapped to several techniques described in the ATT&CK framework, particularly under the T1203 - Exploitation for Client Execution and T1499 - Endpoint Denial of Service tactics. The remote code execution capability falls under T1059 - Command and Scripting Interpreter, while the denial of service aspects align with T1499. Organizations should implement immediate mitigations including applying the vendor patch released for version 1.0.0RC5.2, implementing network segmentation to restrict access to TCP port 8001, and deploying intrusion detection systems to monitor for suspicious traffic patterns. Additionally, network administrators should consider implementing firewall rules that limit access to the database server port to trusted IP addresses only, and conduct thorough vulnerability assessments to ensure no other instances of the vulnerable software exist within the organization's infrastructure. The vulnerability also highlights the importance of input validation practices and proper memory management in server-side applications, emphasizing that buffer overflow protections should be implemented at multiple layers of the application architecture to provide defense in depth against such exploits.