CVE-2000-0451 in Express 8100
Summary
by MITRE
The Intel express 8100 ISDN router allows remote attackers to cause a denial of service via oversized or fragmented ICMP packets.
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Analysis
by VulDB Data Team • 09/27/2024
The vulnerability identified as CVE-2000-0451 affects the Intel express 8100 ISDN router, representing a significant security flaw that enables remote attackers to execute denial of service attacks. This issue stems from the router's inadequate handling of Internet Control Message Protocol packets, specifically when processing oversized or fragmented ICMP messages. The vulnerability exists within the network infrastructure device's packet processing logic, where it fails to properly validate incoming ICMP traffic characteristics before attempting to process or forward them through the network stack.
This technical flaw falls under the category of improper input validation and buffer handling, which aligns with CWE-129 and CWE-131 classification standards. The router's failure to properly validate packet sizes and fragmentation status creates an exploitable condition where malicious actors can craft specially malformed ICMP packets that, when processed by the vulnerable device, cause the router to crash or become unresponsive. The attack vector is particularly concerning as it requires no authentication and can be executed remotely, making it accessible to any attacker with network access to the affected router's interface.
The operational impact of this vulnerability extends beyond simple service disruption, as it can effectively render the ISDN router inoperable and compromise network connectivity for all devices relying on that router for internet access. Organizations utilizing Intel express 8100 ISDN routers in production environments face potential business disruption, especially in scenarios where network availability is critical for operations. The vulnerability can be exploited through various attack methods including sending large ICMP packets exceeding normal network limits or crafting fragmented packets that bypass standard validation checks, leading to memory corruption or resource exhaustion within the router's processing capabilities.
From an ATT&CK framework perspective, this vulnerability maps to the T1499.004 technique related to network denial of service attacks, specifically targeting network infrastructure devices. The attack chain typically involves reconnaissance to identify vulnerable router models, crafting of malicious ICMP packets using tools such as hping or nmap, and execution of the denial of service payload against the target device. Network administrators should implement monitoring solutions to detect unusual ICMP traffic patterns and establish network segmentation to limit the potential impact of such attacks. The recommended mitigations include applying firmware updates from Intel, implementing access control lists to filter ICMP traffic, and deploying intrusion detection systems to identify and block suspicious ICMP packet patterns. Additionally, organizations should consider network redundancy measures and establish incident response procedures to quickly address any exploitation attempts. The vulnerability demonstrates the importance of proper input validation in network infrastructure devices and highlights the need for continuous security assessment of embedded systems used in enterprise networking environments.