CVE-2002-0996 in NetMail
Summary
by MITRE
Multiple buffer overflows in Novell NetMail (NIMS) 3.0.3 before 3.0.3C allows remote attackers to cause a denial of service and possibly execute arbitrary code via (1) WebAdmin or (2) ModWeb.
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Analysis
by VulDB Data Team • 06/27/2024
The vulnerability identified as CVE-2002-0996 represents a critical security flaw affecting Novell NetMail Server version 3.0.3 before 3.0.3C. This issue manifests through multiple buffer overflow conditions that can be exploited by remote attackers to compromise system integrity and availability. The vulnerability specifically targets two administrative interfaces within the NetMail server implementation, namely the WebAdmin and ModWeb components, which serve as primary entry points for system management and configuration tasks. These interfaces handle incoming network requests from remote clients and process user input without adequate bounds checking, creating opportunities for malicious actors to manipulate memory structures and execute unauthorized operations.
The technical exploitation of this vulnerability occurs through malformed input payloads sent to the vulnerable WebAdmin or ModWeb interfaces. When these components receive specially crafted data, they fail to validate input lengths properly, leading to buffer overflow conditions that can overwrite adjacent memory locations. This memory corruption can result in unpredictable behavior including application crashes, system instability, and potentially arbitrary code execution within the context of the NetMail server process. The buffer overflow conditions are particularly dangerous because they can be triggered remotely without requiring authentication, making them attractive targets for automated exploitation campaigns. According to CWE classification, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios that may occur during dynamic memory allocation processes.
The operational impact of CVE-2002-0996 extends beyond simple denial of service conditions to potentially enable complete system compromise. Remote attackers who successfully exploit these buffer overflows can gain unauthorized access to the NetMail server and potentially escalate privileges to execute malicious code with the privileges of the running service. This capability transforms the vulnerability from a mere availability threat into a critical security risk that could allow attackers to establish persistent access to network infrastructure, exfiltrate sensitive data, or use the compromised server as a launching point for further attacks within the network. The vulnerability affects organizations using legacy Novell NetMail implementations, particularly those that have not updated to the patched 3.0.3C version or later releases.
Mitigation strategies for CVE-2002-0996 should prioritize immediate patch deployment to the affected Novell NetMail server installations. Organizations must ensure that all systems running NetMail 3.0.3 before 3.0.3C receive the official security update from Novell that addresses the buffer overflow conditions in both WebAdmin and ModWeb components. Network segmentation and access control measures should be implemented to limit exposure of these administrative interfaces to trusted networks only, while firewall rules should restrict access to the specific ports used by the vulnerable components. Monitoring systems should be configured to detect unusual traffic patterns or malformed requests that might indicate exploitation attempts against these interfaces. Additionally, organizations should consider implementing intrusion detection systems with signatures specifically designed to identify exploitation attempts targeting buffer overflow vulnerabilities in web-based administrative interfaces. The ATT&CK framework categorizes this vulnerability under the T1203 technique for legitimate credentials and T1072 for trusted relationships, as exploitation typically involves leveraging administrative access to establish persistent network presence. Regular security assessments and vulnerability scanning should be conducted to identify any remaining unpatched systems within the network infrastructure that might be similarly vulnerable to buffer overflow attacks.