CVE-2002-0135 in Timbuktu Pro
Summary
by MITRE
Netopia Timbuktu Pro 6.0.1 and earlier allows remote attackers to cause a denial of service (crash) via a series of connections to one of the ports (1417 - 1420).
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Analysis
by VulDB Data Team • 01/01/2025
The vulnerability described in CVE-2002-0135 affects Netopia Timbuktu Pro version 6.0.1 and earlier, representing a significant security flaw that enables remote attackers to execute denial of service attacks against targeted systems. This vulnerability specifically targets the service ports ranging from 1417 to 1420, which are commonly associated with the Timbuktu remote access and administration protocols. The flaw manifests when attackers establish a series of connections to these specific ports, ultimately leading to system crashes and complete service disruption. This type of vulnerability falls under the category of denial of service attacks that exploit protocol implementation weaknesses to compromise system availability. The impact of such an attack can be severe for organizations relying on Timbuktu Pro for remote system administration and support operations, as it can render critical infrastructure inaccessible to legitimate users and administrators.
The technical implementation of this vulnerability stems from inadequate input validation and connection handling within the Timbuktu Pro software. When multiple connection attempts are made to the vulnerable ports, the software fails to properly manage the connection states and resource allocation, leading to memory corruption or stack overflow conditions. This behavior aligns with common software security weaknesses documented in the CWE (Common Weakness Enumeration) database, particularly CWE-129 which addresses improper validation of array indices and CWE-125 which covers out-of-bounds read conditions. The vulnerability demonstrates poor error handling mechanisms and insufficient resource management practices that are frequently exploited in network-based attacks. Attackers can leverage this flaw by systematically establishing connections to the target ports, potentially using automated tools to generate the required connection sequence that triggers the crash condition.
The operational impact of CVE-2002-0135 extends beyond simple system unavailability, as it can compromise business continuity and operational efficiency for organizations utilizing Timbuktu Pro services. When systems crash due to this vulnerability, administrators face significant downtime while attempting to restore services and investigate the incident. The vulnerability's remote nature means that attackers can exploit it from any location without requiring physical access to the target systems, making it particularly dangerous in enterprise environments where remote administration is critical. From an ATT&CK framework perspective, this vulnerability maps to the T1498 technique for network denial of service attacks and represents a weakness in the system's availability defenses. Organizations may experience cascading effects when multiple systems within their network infrastructure are affected, potentially leading to broader service disruptions across dependent applications and services that rely on the compromised Timbuktu Pro functionality.
Mitigation strategies for this vulnerability should focus on immediate patch deployment and network-level protections. Organizations should prioritize upgrading to Timbuktu Pro versions that address this specific flaw, as vendors typically release patches to correct known security issues. Network administrators should implement firewall rules to restrict access to the vulnerable ports 1417 through 1420, particularly from untrusted networks or sources. Additionally, monitoring systems should be configured to detect unusual connection patterns or spikes in connection attempts to these ports, which could indicate exploitation attempts. The implementation of connection rate limiting and automated response mechanisms can help prevent successful exploitation attempts. Organizations should also consider implementing intrusion detection systems that can identify and alert on suspicious traffic patterns associated with this vulnerability. Regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of the vulnerable software within the network infrastructure, ensuring comprehensive protection against similar threats that may exploit similar protocol implementation weaknesses.