CVE-1999-1320 in NetWare
Summary
by MITRE
Vulnerability in Novell NetWare 3.x and earlier allows local users to gain privileges via packet spoofing.
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Analysis
by VulDB Data Team • 04/20/2026
The vulnerability described in CVE-1999-1320 represents a critical privilege escalation flaw within Novell NetWare 3.x and earlier versions that stems from insufficient authentication mechanisms during network communication. This issue specifically affects the core networking protocols used by NetWare to handle packet transmission and reception, creating a pathway for local attackers to manipulate network traffic and assume elevated system privileges. The vulnerability exploits weaknesses in how the operating system validates incoming network packets, particularly those originating from local network interfaces or directly connected systems. According to CWE-284, this represents an improper privilege management vulnerability where the system fails to properly enforce access controls during network packet processing, allowing unauthorized users to bypass normal security boundaries.
The technical implementation of this vulnerability relies on packet spoofing techniques that enable attackers to craft network packets that appear to originate from legitimate sources within the network. In NetWare 3.x and earlier systems, the authentication and validation processes for incoming packets do not adequately verify the authenticity of packet sources, particularly when dealing with local network connections. Attackers can exploit this by sending specially crafted packets that mimic trusted network endpoints, thereby tricking the system into treating these packets as legitimate communications. The flaw exists in the network layer processing where the system accepts packets without sufficient verification of the source's identity, allowing malicious actors to escalate their privileges through manipulation of network protocols that should otherwise be protected from local modification.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially compromise entire network infrastructures that rely on NetWare 3.x systems. Local users who can access network interfaces or have the ability to send packets to the target system can exploit this vulnerability to gain administrative privileges, which could lead to complete system compromise. This vulnerability is particularly dangerous in environments where multiple users share the same physical or virtual network space, as it allows attackers to leverage local network access to escalate their privileges without requiring external network access or complex exploitation techniques. The impact is further amplified by the fact that many organizations in the late 1990s and early 2000s heavily relied on NetWare for their network services, making this vulnerability a significant threat to enterprise security.
Mitigation strategies for CVE-1999-1320 require immediate implementation of network segmentation and access controls to limit local network access to critical systems. Organizations should implement network monitoring solutions that can detect anomalous packet patterns and unauthorized privilege escalation attempts. According to ATT&CK framework, this vulnerability maps to privilege escalation techniques where adversaries exploit weaknesses in authentication mechanisms to gain elevated privileges. The recommended approach includes disabling unnecessary network services, implementing proper network access controls, and ensuring that all systems are updated to versions that address this specific vulnerability. Security administrators should also consider implementing network intrusion detection systems that can identify and alert on suspicious packet spoofing activities, as well as establishing strict network access policies that limit local access to critical network services. Regular security audits and vulnerability assessments should be conducted to identify systems running vulnerable versions of NetWare and ensure proper patching or migration to supported network operating systems.