CVE-2007-1534 in Windows
Summary
by MITRE
DFSR.exe in Windows Meeting Space in Microsoft Windows Vista remains available for remote connections on TCP port 5722 for 2 minutes after Windows Meeting Space is closed, which allows remote attackers to have an unknown impact by connecting to this port during the time window.
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Analysis
by VulDB Data Team • 09/16/2018
The vulnerability identified as CVE-2007-1534 pertains to a security flaw in the Windows Meeting Space feature of Microsoft Windows Vista operating systems. This issue specifically affects the Distributed File System Replication service component known as DFSR.exe which is responsible for managing file synchronization between computers within a network. The flaw manifests as a time window vulnerability where the service continues to accept remote connections on TCP port 5722 for a duration of two minutes even after the Windows Meeting Space application has been closed by the user.
The technical nature of this vulnerability stems from improper resource management and service cleanup procedures within the Windows Meeting Space implementation. When users close the Windows Meeting Space application, the underlying DFSR.exe process does not immediately terminate its network listening state on port 5722. This creates a temporary window of opportunity where unauthorized remote attackers can establish connections to the service and potentially exploit the open port before the service fully closes. The vulnerability represents a classic case of a race condition between service termination and network port closure, where the timing gap allows for unauthorized access.
The operational impact of this vulnerability extends beyond simple network connectivity issues as it creates potential attack vectors for malicious actors who might exploit this window to perform unauthorized file operations or gain access to network resources. During the two-minute window, attackers could potentially establish connections to perform actions such as file enumeration, data exfiltration, or even execute malicious code if the service process contains additional vulnerabilities. This represents a significant security risk in environments where Windows Vista systems are deployed, particularly in corporate networks where unauthorized access to file sharing services could compromise sensitive data and network integrity.
This vulnerability aligns with CWE-119, which addresses improper restriction of operations within a memory buffer, and more specifically relates to CWE-665, improper initialization of a resource, as the service fails to properly clean up its network resources. From an ATT&CK framework perspective, this vulnerability maps to T1071.004, Application Layer Protocol: DNS, and T1046, Network Service Scanning, as attackers could potentially use this window to probe for open services and establish persistent access. The vulnerability also connects to T1059, Command and Scripting Interpreter, as it could provide an entry point for attackers to execute commands through the file sharing service.
Mitigation strategies for this vulnerability should include immediate deployment of Microsoft security patches that address the service cleanup behavior and ensure proper resource termination. Network administrators should implement firewall rules to restrict access to TCP port 5722, particularly in enterprise environments where Windows Meeting Space is not required. Additionally, monitoring systems should be configured to detect unusual network activity on this port, and regular security assessments should verify that the vulnerability has been properly addressed. Organizations should also consider disabling Windows Meeting Space entirely if the service is not required, as this eliminates the attack surface entirely. The vulnerability highlights the importance of proper service lifecycle management and resource cleanup in operating system implementations, particularly for network-facing services that handle file sharing operations.