CVE-2002-2133 in 1120 ASDL Router
Summary
by MITRE
Telindus 1100 ASDL router running firmware 6.0.x uses weak encryption for UDP session traffic, which allows remote attackers to gain unauthorized access by sniffing and decrypting the administrative password.
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Analysis
by VulDB Data Team • 04/20/2019
The Telindus 1100 ASDL router represents a significant security vulnerability in network infrastructure devices, specifically targeting the firmware version 6.0.x which was widely deployed in enterprise and residential environments. This vulnerability stems from the implementation of weak encryption algorithms for UDP session traffic, creating a critical pathway for unauthorized network access. The flaw demonstrates poor cryptographic practices that violate fundamental security principles for protecting administrative communications.
The technical implementation of this vulnerability involves the use of insufficiently strong encryption mechanisms for UDP traffic, which typically carries session management and administrative commands between network devices and management interfaces. When attackers can successfully sniff network traffic and decrypt these communications, they gain access to administrative credentials that provide full control over the router configuration. This weakness falls under the category of cryptographic weakness as defined by CWE-327, specifically targeting the use of insecure or weak encryption algorithms. The vulnerability creates a direct path for privilege escalation attacks and represents a fundamental failure in implementing secure network communications.
The operational impact of this vulnerability extends beyond simple credential theft, as it enables comprehensive network compromise through the administrative interface. Attackers can modify router configurations, redirect traffic, disable security features, and establish persistent access points within the network. This represents a critical security failure that allows remote code execution through legitimate administrative channels, aligning with ATT&CK technique T1021.001 for remote services and T1078 for valid accounts. The vulnerability particularly affects organizations that rely on Telindus routers for network connectivity, potentially compromising entire network infrastructures through a single compromised administrative session.
Mitigation strategies must address both immediate remediation and long-term security improvements. Organizations should implement firmware updates from Telindus or vendor-provided patches that address the encryption weakness, while also deploying network segmentation to isolate critical administrative functions. Network monitoring solutions should be enhanced to detect unusual UDP traffic patterns that might indicate credential sniffing attempts, and administrators should enforce strong authentication mechanisms including multi-factor authentication. The vulnerability underscores the importance of proper cryptographic implementation and highlights the need for regular security assessments of network infrastructure components. Additionally, organizations should consider implementing network access control lists and firewall rules to restrict administrative access to trusted networks only, while maintaining audit trails of all administrative activities to detect potential exploitation attempts.