CVE:CVE-2007-3409
CNNVD:CNNVD-200706-461
Net::DNS是用Perl实现的DNS解析器。 
Net::DNS实现上存在漏洞，远程攻击者可能利用此漏洞导致DNS服务器被欺骗或拒绝服务。
发送了自我引用的畸形DNS报文(如www.example.<pointer>中的指针再次指向www)的话，Net::DNS中的PP实现可能会陷入死循环。
solution:Upgrade nlnet_labs net_dns to a higher version than 0.14,0.20,0.21,0.22,0.23,0.24,0.25,0.26,0.27,0.28,0.29,0.30,0.31,0.32,0.33,0.34,0.34_02,0.34_03,0.35,0.36,0.37,0.38,0.38_01,0.38_02,0.39,0.39_01,0.39_02,0.40,0.40_01,0.41,0.42,0.42_01,0.42_02,0.43,0.44,0.44_01,0.44_02,0.45,0.45_01,0.46,0.47,0.47_01,0.48,0.48_01,0.48_02,0.48_03,0.49,0.49_01,0.49_02,0.49_03,0.50,0.51,0.51_01,0.51_02,0.52,0.53,0.53_01,0.53_02,0.54,0.55,0.56,0.57,0.58,0.59,and avoid the version 0.14,0.20,0.21,0.22,0.23,0.24,0.25,0.26,0.27,0.28,0.29,0.30,0.31,0.32,0.33,0.34,0.34_02,0.34_03,0.35,0.36,0.37,0.38,0.38_01,0.38_02,0.39,0.39_01,0.39_02,0.40,0.40_01,0.41,0.42,0.42_01,0.42_02,0.43,0.44,0.44_01,0.44_02,0.45,0.45_01,0.46,0.47,0.47_01,0.48,0.48_01,0.48_02,0.48_03,0.49,0.49_01,0.49_02,0.49_03,0.50,0.51,0.51_01,0.51_02,0.52,0.53,0.53_01,0.53_02,0.54,0.55,0.56,0.57,0.58,0.59