Denial of Service Vulnerability in ICMP Path MTU Discovery on Various UNIX Systems
CVE-2001-0323

Currently unrated

Key Information:

Vendor: Various UNIX vendors
Status: ICMP Path MTU Discovery
Vendor: CVE Published:; 2 June 2001

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What is CVE-2001-0323?

The ICMP path MTU discovery feature in multiple UNIX-based systems is susceptible to a denial of service attack. Attackers can exploit this vulnerability by sending specially crafted ICMP packets that spoof 'ICMP Fragmentation needed but Don't Fragment (DF) set' messages. This can lead to a situation where one host inadvertently reduces its Maximum Transmission Unit (MTU) when communicating with another host, resulting in disrupted network communication and service unavailability.

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