Please check our advisory files regularly for updates that relate to your site. The CERT Coordination Center has received several reports of sites being attacked by either one or both of these tools. It is important to note that it may be necessary for a system administrator to apply separate patches, if they exist, for each attack tool. Teardrop is a widely available attack tool that exploits this vulnerability. Land is a widely available attack tool that exploits this vulnerability.
Any remote user can crash a vulnerable machine.
You may have to apply different patches for each attack tool. You may want to use the workaround for Land, so please review both Sections A and B below. We will update the appendix as we receive more information. Please contact your vendor directly. It is important to note that you may have to apply different patches for each attack tool.