CVE-2006-5980 in NetJetServer
Summary
by MITRE
adm_lgn_admin.asp in Renasoft NetJetServer 2.5.3.939, and possibly earlier, does not properly perform login authentication, which allows remote attackers to obtain administrative privileges. NOTE: the provenance of this information is unknown; details are obtained from third party sources.
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Analysis
by VulDB Data Team • 04/28/2026
The vulnerability identified as CVE-2006-5980 affects the Renasoft NetJetServer version 2.5.3.939 and potentially earlier versions, specifically targeting the adm_lgn_admin.asp component. This represents a critical authentication flaw that undermines the fundamental security posture of the web server application. The issue stems from inadequate validation of user credentials during the administrative login process, creating a pathway for unauthorized access to privileged administrative functions. The vulnerability exists within the authentication mechanism itself, where proper credential verification fails to occur, allowing attackers to bypass the standard login procedures entirely. This type of flaw directly violates security principles and represents a significant weakness in the application's access control implementation.
The technical nature of this vulnerability falls under CWE-287, which addresses improper authentication issues in software systems. The flaw manifests as a failure in the authentication process where the adm_lgn_admin.asp script does not adequately verify user credentials before granting administrative access. Attackers can exploit this weakness by crafting specific requests that bypass the normal authentication flow, potentially gaining full administrative control over the NetJetServer instance. The vulnerability's remote exploitability means that attackers do not require physical access or local network presence to leverage the flaw, making it particularly dangerous in networked environments. This authentication bypass allows unauthorized users to perform administrative functions such as modifying server configurations, accessing sensitive data, or executing commands with elevated privileges.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete administrative control over the affected NetJetServer. This level of access enables malicious actors to modify server configurations, install malware, steal sensitive information, or disrupt services entirely. The vulnerability affects the confidentiality, integrity, and availability of the system, as attackers can manipulate data, alter system settings, and potentially cause service outages. Organizations relying on this software for web hosting or network services face significant risk exposure, particularly in environments where administrative access is required for system maintenance and configuration. The remote nature of the exploit means that attackers can target vulnerable systems from anywhere on the internet, amplifying the potential impact and attack surface.
Mitigation strategies for this vulnerability should include immediate implementation of security patches provided by the vendor, as well as network-level protections such as firewall rules that restrict access to administrative interfaces. Organizations should implement strong access controls, including multi-factor authentication where possible, and regularly audit system configurations to ensure proper security settings. Network segmentation can help limit the potential impact of exploitation by restricting access to administrative functions to trusted networks only. Additionally, regular security assessments and penetration testing should be conducted to identify similar authentication flaws in other systems. The vulnerability highlights the importance of proper authentication implementation and underscores the need for security testing throughout the software development lifecycle. Organizations should also consider implementing intrusion detection systems to monitor for suspicious login attempts and anomalous administrative activities that may indicate exploitation attempts.