CVE:CVE-2006-5873
CNNVD:CNNVD-200612-224
layer 2 tunneling protocol network server (l2tpns)的2.1.21之前版本中cluster.c中的cluster_process_heartbeat函数存在缓冲区溢出，远程攻击者可以通过大heartbeat包来发起拒绝服务攻击。
solution:Upgrade l2tpns l2tpns to a higher version than 1.1,2.0.13,2.1,and avoid the version 1.1,2.0.13,2.1; Upgrade debian debian_linux to a higher version than 3.1,and avoid the version 3.1