CVE:CVE-2009-4008
CNNVD:CNNVD-201105-302
Unbound是荷兰NLnet实验室负责维护的一套基于C语言的开源递归式DNS服务器软件。
Unbound 1.4.4之前版本在处理未明查询失败后，不能向已签名的区域发送请求。远程攻击者可以借助特制查询导致拒绝服务（DNSSEC中断）。
solution:Upgrade nlnetlabs unbound to a higher version than 1.4.3,0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.7.1,0.7.2,0.8,0.09,0.10,0.11,1.0.0,1.0.1,1.0.2,1.1.0,1.1.1,1.2.0,1.2.1,1.3.0,1.3.1,1.3.2,1.3.3,1.3.4,1.4.0,1.4.1,1.4.2,and avoid the version (,1.4.3],0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.7.1,0.7.2,0.8,0.09,0.10,0.11,1.0.0,1.0.1,1.0.2,1.1.0,1.1.1,1.2.0,1.2.1,1.3.0,1.3.1,1.3.2,1.3.3,1.3.4,1.4.0,1.4.1,1.4.2