CVE-2007-1748 in Windows
Summary
by MITRE
Stack-based buffer overflow in the RPC interface in the Domain Name System (DNS) Server Service in Microsoft Windows 2000 Server SP 4, Server 2003 SP 1, and Server 2003 SP 2 allows remote attackers to execute arbitrary code via a long zone name containing character constants represented by escape sequences.
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Analysis
by VulDB Data Team • 06/09/2025
The vulnerability described in CVE-2007-1748 represents a critical stack-based buffer overflow within the Remote Procedure Call (RPC) interface of Microsoft Windows DNS Server Service. This flaw exists specifically in Windows 2000 Server Service Pack 4 and Windows Server 2003 versions with Service Pack 1 and Service Pack 2, making it a significant concern for enterprise environments that rely on these older operating systems. The vulnerability stems from inadequate input validation within the DNS server's RPC handling mechanism, where the service fails to properly sanitize zone names containing escape sequences, creating a condition that allows attackers to overwrite adjacent stack memory.
The technical exploitation of this vulnerability occurs through a carefully crafted DNS zone name that contains character constants represented by escape sequences, which when processed by the vulnerable DNS server service, triggers a buffer overflow condition. The stack-based nature of this vulnerability means that the overflow corrupts the return addresses and other critical stack frame data, potentially allowing remote attackers to execute arbitrary code with the privileges of the DNS server process. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue that has been consistently identified as a high-risk category in software security assessments.
The operational impact of CVE-2007-1748 extends beyond simple code execution, as it provides attackers with a potential pathway to establish persistent access within network environments. Since DNS servers typically operate with elevated privileges and serve as critical infrastructure components, successful exploitation could lead to complete system compromise, allowing attackers to gain unauthorized access to network resources, perform man-in-the-middle attacks, or use the compromised server as a pivot point for further reconnaissance and lateral movement. The vulnerability's remote exploitability means that attackers do not need local access to the system, making it particularly dangerous in environments where network exposure is high. This aligns with ATT&CK technique T1071.004 for Application Layer Protocol: DNS, where attackers leverage DNS services for command and control communications.
Mitigation strategies for this vulnerability should focus on immediate patching of affected systems, as Microsoft released security updates addressing this specific issue through their regular security bulletin process. Organizations should also implement network segmentation to limit access to DNS services, deploy intrusion detection systems to monitor for suspicious DNS queries containing malformed zone names, and consider disabling unnecessary DNS server functionality to reduce the attack surface. Additionally, implementing proper input validation and sanitization within DNS server configurations can help prevent similar vulnerabilities from being exploited even if the primary patch is not immediately applied. The vulnerability serves as a reminder of the importance of maintaining up-to-date security patches and the critical nature of proper input validation in server-side applications, particularly those handling network protocols where malformed input can lead to remote code execution.