CVE:CVE-2017-12246
CNNVD:CNNVD-201710-059
Cisco ASA 5500 Series Adaptive Security Appliances等都是美国思科（Cisco）公司的产品。Cisco ASA 5500 Series Adaptive Security Appliances和ASA 5500-X Series Next-Generation Firewalls都是防火墙安全设备。ASA Services Module for Cisco Catalyst 6500 Series Switches是一款交换机设备。Adaptive Security Appliances（ASA，自适应安全设备）Software是其中的一套运行于安全设备的操作系统。
多款Cisco产品中的ASA Software的直接身份验证功能的实现存在拒绝服务漏洞，该漏洞源于程序没有正确的对HTTP包头执行输入验证。远程攻击者可通过向受影响设备的本地IP地址发送特制的HTTP请求利用该漏洞造成拒绝服务（设备重新加载）。以下产品受到影响：Cisco ASA 5500 Series Adaptive Security Appliances；ASA 5500-X Series Next-Generation Firewalls；ASA Services Module for Cisco Catalyst 6500 Series Switches和Cisco 7600 Series Routers；ASA 1000V Cloud Firewall；Adaptive Security Virtual Appliance (ASAv)；Firepower 4110 Security Appliance；Firepower 9300 ASA Security Module；ISA 3000 Industrial Security Appliance。
solution:Upgrade cisco adaptive_security_appliance_software to a higher version than 9.4(3,9.7(1,9.8(0.56,and avoid the version 9.4(3),9.7(1),9.8(0.56)