CVE:CVE-2018-0331
CNNVD:CNNVD-201806-1119
Cisco Firepower 4100 Series Next-Generation Firewall等都是美国思科（Cisco）公司的产品。Cisco Firepower 4100 Series Next-Generation Firewall是一款4100系列防火墙产品。Multilayer Director Switches是一款网关设备。Firepower Extensible Operating System（FXOS）和NX-OS System Software都是使用在其中的系统。NX-OS Software是一套面向数据中心的操作系统。Discovery Protocol（前称CDP）subsystem是其中的一个Cisco设备发现协议子系统。
多款Cisco产品中的NX-OS Software的Discovery Protocol子系统存在资源管理错误漏洞，该漏洞源于程序没有正确的验证Cisco Discovery Protocol消息中的某些字段。攻击者可通过提交Cisco Discovery Protocol消息利用该漏洞造成拒绝服务。以下产品受到影响：Cisco Firepower 4100 Series Next-Generation Firewall；Firepower 9300 Security Appliance；MDS 9000 Series Multilayer Director Switches；Nexus 1000V Series Switches；Nexus 1100 Series Cloud Services Platforms；Nexus 2000 Series Switches；Nexus 3000 Series Switches；Nexus 3500 Platform Switches；Nexus 3600 Platform Switches；Nexus 5500 Platform Switches；Nexus 5600 Platform Switches；Nexus 6000 Series Switches；Nexus 7000 Series Switches；Nexus 7700 Series Switches；Nexus 9000 Series Switches（在NX-OS模式下）；Nexus 9500 R-Series Line Cards and Fabric Modules；UCS 6100 Series Fabric Interconnects；UCS 6200 Series Fabric Interconnects；UCS 6300 Series Fabric Interconnects。
solution:Upgrade cisco nx-os to a higher version than 7.1\(5\n1\(1\,7.3\(3\n1\(1\,6.0,7.0,7.2,6.2\(20\,7.2\(2\d1\(3\,7.3\(2\d1\(1\,8.1\(2\,8.2\(1\,8.0,7.0\(3\i3,7.0\(3\i7\(1\,7.0\(3\i7\(1\,7.3\(3\n1\(1\,8.1\(1a\,2.2\(8g\,3.1\(2f\,and avoid the version [7.1,7.1\(5\)n1\(1\)),[7.3,7.3\(3\)n1\(1\)),6.0,7.0,7.2,[6.2,6.2\(20\)),[7.2,7.2\(2\)d1\(3\)),[7.3,7.3\(2\)d1\(1\)),[8.1,8.1\(2\)),[8.2,8.2\(1\)),8.0,(,7.0\(3\)i3),[7.0\(3\)i4,7.0\(3\)i7\(1\)),(,7.0\(3\)i7\(1\)),[6.0,7.3\(3\)n1\(1\)),[5.2,8.1\(1a\)),(,2.2\(8g\)),[2.5,3.1\(2f\)); Upgrade cisco firepower_extensible_operating_system to a higher version than 2.0.1.153,2.1.1.86,2.2.1.70,and avoid the version [1.1,2.0.1.153),[2.1.1,2.1.1.86),[2.2.1,2.2.1.70); Upgrade cisco fxos to a higher version than 2.2.2.14,2.0.1.152,and avoid the version [2.2.2,2.2.2.14),[1.1,2.0.1.152)