CVE-2008-3479 in Windows
Summary
by MITRE
Heap-based buffer overflow in the Microsoft Message Queuing (MSMQ) service (mqsvc.exe) in Microsoft Windows 2000 SP4 allows remote attackers to read memory contents and execute arbitrary code via a crafted RPC call, related to improper processing of parameters to string APIs, aka "Message Queuing Service Remote Code Execution Vulnerability."
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 05/26/2025
The CVE-2008-3479 vulnerability represents a critical heap-based buffer overflow in Microsoft Message Queuing service mqsvc.exe running on Windows 2000 Service Pack 4 systems. This flaw specifically targets the remote procedure call (RPC) interface of MSMQ, which serves as a core messaging infrastructure component enabling reliable message transmission between applications across network boundaries. The vulnerability stems from inadequate input validation within the service's parameter processing mechanisms, particularly when handling string API calls that manipulate memory buffers. Attackers can exploit this weakness by crafting malicious RPC requests that trigger memory corruption during string operations, creating opportunities for both information disclosure and arbitrary code execution. The vulnerability's remote exploitation capability makes it particularly dangerous as it does not require local system access or authentication, allowing attackers to leverage the MSMQ service's network accessibility for unauthorized system compromise.
The technical exploitation of this vulnerability involves leveraging the improper handling of string parameters within the MSMQ service's RPC processing pipeline. When the mqsvc.exe service receives a malformed RPC request containing oversized or malformed string data, the underlying string manipulation functions fail to properly bounds-check the input before copying it into fixed-size heap buffers. This classic heap overflow condition occurs because the service uses insecure string handling routines that do not validate buffer boundaries before performing memory operations such as strcpy, strcat, or similar functions. The flaw manifests when the service processes parameters passed through the RPC interface, particularly in scenarios involving message queuing operations that require string parameter processing. The buffer overflow creates a condition where attacker-controlled data can overwrite adjacent memory locations, potentially corrupting critical service structures or allowing code execution at privilege levels corresponding to the MSMQ service account. This vulnerability directly maps to CWE-121, heap-based buffer overflow, and CWE-122, heap-based buffer overflow, where insufficient bounds checking leads to memory corruption during dynamic memory allocation operations.
The operational impact of CVE-2008-3479 extends beyond simple remote code execution to encompass significant information disclosure capabilities and potential system compromise. An attacker who successfully exploits this vulnerability can gain access to sensitive memory contents, potentially exposing credentials, application data, or system configuration information stored in the service's memory space. The remote code execution capability allows adversaries to run malicious code with the privileges of the MSMQ service, which typically operates with elevated system privileges on Windows 2000 systems. This exploitation scenario presents multiple attack vectors through the ATT&CK framework, specifically leveraging T1059 for command execution, T1068 for privilege escalation, and T1071 for application layer protocol usage. The vulnerability affects organizations using Windows 2000 systems with MSMQ installed, particularly those with network-accessible message queuing services, creating potential for widespread compromise in enterprise environments where legacy systems remain operational. The impact is amplified in environments where MSMQ is used for inter-application communication or as part of larger distributed systems, as successful exploitation could lead to lateral movement and further compromise of network resources.
Mitigation strategies for CVE-2008-3479 should prioritize immediate patch application through Microsoft's security updates, as the vulnerability has been addressed through official service packs and security rollups. Organizations should implement network segmentation to limit access to MSMQ service endpoints, particularly by restricting RPC port access to trusted network segments. The principle of least privilege should be enforced by ensuring that MSMQ service accounts operate with minimal required permissions and that the service is not running with administrative privileges. System administrators should monitor for suspicious RPC activity and implement intrusion detection systems to identify potential exploitation attempts. Additionally, disabling unnecessary MSMQ functionality and removing the service entirely if not required provides the most effective defense against this vulnerability. Network-based mitigations including firewall rules restricting access to the MSMQ RPC endpoints on ports 1024-1030 and implementing proper network access controls can help reduce the attack surface. Security hardening practices should include regular vulnerability assessments and ensuring that legacy Windows 2000 systems are properly isolated from critical network segments to prevent exploitation attempts from reaching production environments. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and the risks associated with running unsupported operating systems in enterprise environments.