CVE-2005-2551 in eDirectory
Summary
by MITRE
Buffer overflow in dhost.exe in iMonitor for Novell eDirectory 8.7.3 on Windows allows attackers to cause a denial of service (crash) and obtain access to files via unknown vectors.
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Analysis
by VulDB Data Team • 04/22/2025
The vulnerability identified as CVE-2005-2551 represents a critical buffer overflow flaw within the dhost.exe component of iMonitor for Novell eDirectory version 8.7.3 running on Windows systems. This issue resides in the network monitoring and management functionality of the software, which is designed to monitor Novell eDirectory services and provide administrative oversight. The buffer overflow occurs during processing of network requests or data handling within the dhost.exe service, creating a condition where malicious input can exceed the allocated memory buffer space and overwrite adjacent memory locations. This particular vulnerability falls under the CWE-121 category of stack-based buffer overflow, though the specific attack vectors remain undisclosed in the public record, indicating a sophisticated nature that could potentially be exploited through various input manipulation techniques.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it creates potential pathways for unauthorized file access and system compromise. When the buffer overflow occurs, it can cause the dhost.exe process to crash and terminate unexpectedly, leading to service disruption for the Novell eDirectory monitoring infrastructure. However, the more concerning aspect involves the potential for attackers to craft malicious input that not only crashes the service but could also enable arbitrary code execution or file access permissions manipulation. This represents a significant risk to enterprise network security, particularly in environments where Novell eDirectory serves as a critical directory service for authentication and access control. The vulnerability's exploitation could potentially allow attackers to escalate privileges, access sensitive directory information, or disrupt critical network authentication services that rely on eDirectory for user and resource management.
From a cybersecurity perspective, this vulnerability aligns with ATT&CK technique T1203 which involves legitimate programs being used to dump credentials or access sensitive data through buffer overflow exploitation. The attack surface is particularly concerning because iMonitor applications typically run with elevated privileges to perform monitoring functions, making successful exploitation potentially devastating for network security posture. Organizations using this software face heightened risk during network reconnaissance phases when attackers may attempt to identify vulnerable systems through fingerprinting techniques. The lack of specific attack vector documentation in the CVE entry suggests that this vulnerability may have been actively exploited in the wild, potentially through multiple attack vectors including malformed network packets, malicious configuration data, or crafted input to the monitoring service. Security professionals should consider implementing network segmentation and monitoring for unusual dhost.exe process behavior as part of their defensive strategies.
Mitigation strategies for this vulnerability should include immediate software updates and patches from the vendor, as well as network-level restrictions to limit access to the dhost.exe service. Organizations should implement network monitoring to detect anomalous behavior in the monitoring service and establish incident response procedures for potential exploitation attempts. The vulnerability demonstrates the importance of secure coding practices and input validation in network services, particularly those that handle external data inputs. System administrators should also consider disabling unnecessary monitoring services when they are not actively required and implement proper access controls to limit who can interact with the monitoring components. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other network monitoring tools and services that may present similar attack surfaces. The vulnerability serves as a reminder of the critical need for maintaining up-to-date security patches and the potential consequences of running legacy monitoring software in enterprise environments.