CVE-2000-0651 in BorderManager
Summary
by MITRE
The ClientTrust program in Novell BorderManager does not properly verify the origin of authentication requests, which could allow remote attackers to impersonate another user by replaying the authentication requests and responses from port 3024 of the victim s machine.
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Analysis
by VulDB Data Team • 05/27/2018
The vulnerability identified as CVE-2000-0651 resides within Novell BorderManager's ClientTrust program, representing a critical authentication flaw that undermines the security of networked environments. This issue stems from inadequate validation mechanisms that fail to properly authenticate the source of authentication requests, creating a pathway for malicious actors to exploit the system's trust model. The vulnerability specifically targets port 3024, which serves as the communication channel for authentication exchanges within the BorderManager framework, making it a prime target for interception and replay attacks.
The technical flaw manifests through a lack of proper origin verification within the ClientTrust authentication process, allowing attackers to capture legitimate authentication requests and responses from the victim's machine. This weakness enables man-in-the-middle attacks where adversaries can replay captured authentication data to gain unauthorized access to network resources. The vulnerability operates at the protocol level, exploiting the absence of cryptographic verification or source authentication checks that should normally validate the legitimacy of authentication messages. This design flaw creates a trust relationship that can be easily subverted by attackers who possess the ability to monitor network traffic on port 3024.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally compromises the integrity of the authentication system. Attackers can impersonate legitimate users and potentially gain access to sensitive network resources, administrative functions, and confidential data stored within the BorderManager environment. The vulnerability affects organizations relying on Novell BorderManager for network security, potentially leading to complete system compromise if not addressed. The ease of exploitation, combined with the potential for privilege escalation, makes this vulnerability particularly dangerous in enterprise environments where BorderManager is deployed for perimeter security.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-287, which addresses improper authentication issues, and maps to ATT&CK technique T1566 for credential access through phishing or network manipulation. The flaw demonstrates poor implementation of authentication protocols and highlights the importance of proper input validation and source verification in security-critical applications. Organizations should implement network segmentation to isolate critical authentication ports, deploy intrusion detection systems to monitor for suspicious replay patterns, and ensure proper patch management for BorderManager products. Additionally, implementing strong cryptographic measures and session validation mechanisms would mitigate the risk of such replay attacks, while regular security assessments can help identify similar authentication weaknesses in other network security components.