CVE-2006-6443 in Novell
Summary
by MITRE
Buffer overflow in the Novell Distributed Print Services (NDPS) Print Provider for Windows component (NDPPNT.DLL) in Novell Client 4.91 has unknown impact and remote attack vectors.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2006-6443 represents a critical buffer overflow flaw within the Novell Distributed Print Services print provider component known as NDPPNT.DLL. This issue exists within the Novell Client 4.91 software suite, specifically affecting the Windows operating system environment where the print provider functionality is utilized. The vulnerability manifests in the handling of print requests and related data processing within the NDPS framework, creating a potential entry point for malicious actors to exploit system resources and compromise networked printing environments.
The technical implementation of this buffer overflow occurs within the NDPPNT.DLL library which serves as the interface between the Novell Client and the Windows printing subsystem. When processing print jobs or related network communications, the component fails to properly validate input lengths and buffer boundaries, allowing an attacker to overflow memory buffers and potentially overwrite adjacent memory locations. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, though the exact memory corruption patterns may vary based on the specific implementation details of the print provider component.
From an operational perspective, this vulnerability presents significant risks to enterprise networks that utilize Novell Client 4.91 for their printing infrastructure. The remote attack vectors suggest that malicious actors could potentially exploit this flaw without requiring physical access to the target systems, making it particularly dangerous in networked environments where printing services are exposed to external networks. The unknown impact classification indicates that the full scope of potential damage remains uncertain, though buffer overflows of this nature typically enable privilege escalation, arbitrary code execution, or system crashes that could disrupt business operations and compromise sensitive data flows through the printing infrastructure.
The exploitation of this vulnerability could result in complete system compromise, allowing attackers to execute malicious code with the privileges of the print service account or potentially escalate to system-level access. Network administrators should consider this vulnerability as part of a broader attack surface that includes network printing services, which often have elevated privileges and may serve as stepping stones for further lateral movement within enterprise environments. Organizations utilizing this specific version of Novell Client should immediately implement mitigation strategies including patching, network segmentation, and monitoring for suspicious print-related network traffic patterns.
The attack surface for this vulnerability aligns with ATT&CK technique T1059.007 for command and script interpreter and T1068 for exploit for privilege escalation, as attackers could leverage the buffer overflow to gain elevated privileges within the printing environment. Security professionals should also consider implementing network-based intrusion detection systems to monitor for patterns consistent with buffer overflow exploitation attempts, particularly targeting the specific DLL and component names associated with this vulnerability. The remediation process should include immediate patch deployment from Novell, followed by comprehensive vulnerability assessments to identify any potential exploitation attempts that may have occurred prior to patching implementation.
Organizations should also evaluate their print service configurations and implement principle of least privilege models for print provider components, ensuring that print services operate with minimal required privileges to reduce potential impact from successful exploitation attempts. The vulnerability serves as a reminder of the critical importance of maintaining updated client software and monitoring for vulnerabilities in legacy systems that may continue to operate in enterprise environments despite newer alternatives being available. Security teams should also consider this vulnerability within the context of broader network security postures, particularly in environments where print services are exposed to untrusted networks or where traditional network segmentation controls may be insufficient to protect against this type of remote exploitation.