CVE:CVE-2014-2111
CNNVD:CNNVD-201403-510
Cisco IOS是美国思科（Cisco）公司为其网络设备开发的操作系统。
Cisco IOS 12.2至12.4版本和15.0至15.4版本中的Application Layer Gateway (ALG)模块存在安全漏洞。当使用NAT时，远程攻击者可借助特制的DNS数据包利用该漏洞造成拒绝服务。
solution:Upgrade cisco ios to a higher version than 12.2,12.3,12.4,15.0,15.1,15.2,15.3,15.4,and avoid the version 12.2,12.3,12.4,15.0,15.1,15.2,15.3,15.4
solution:Upgrade cisco security_manager to a higher version than 4.2,3.0.2,3.1,3.1.1,3.1.1:sp3,3.2,3.2:sp1,3.2:sp2,3.2.1,3.2.1:sp1,3.2.2,3.2.2:sp1,3.2.2:sp2,3.2.2:sp3,3.2.2:sp4,3.3,3.3:sp1,3.3:sp2,3.3.1,3.3.1:sp1,3.3.1:sp2,3.3.1:sp3,3.3.1:sp4,4.0,4.0:sp1,4.0.1,4.0.1:sp1,4.0.1:sp2,4.1,4.1:sp1,4.1:sp2,and avoid the version (,4.2],3.0.2,3.1,3.1.1,3.1.1:sp3,3.2,3.2:sp1,3.2:sp2,3.2.1,3.2.1:sp1,3.2.2,3.2.2:sp1,3.2.2:sp2,3.2.2:sp3,3.2.2:sp4,3.3,3.3:sp1,3.3:sp2,3.3.1,3.3.1:sp1,3.3.1:sp2,3.3.1:sp3,3.3.1:sp4,4.0,4.0:sp1,4.0.1,4.0.1:sp1,4.0.1:sp2,4.1,4.1:sp1,4.1:sp2