CVE:CVE-2012-5717
CNNVD:CNNVD-201301-384
Cisco Adaptive Security Appliances（ASA，自适应安全设备）Software是美国思科（Cisco）公司的一套运行于防火墙中的操作系统。
Cisco Adaptive Security Appliances (ASA)设备固件8.x至8.4(1)版本中存在漏洞，该漏洞源于程序没有正确管理SSH会话。通过建立多个会话，远程认证的攻击者利用该漏洞导致拒绝服务（设备崩溃）。
solution:Upgrade cisco adaptive_security_appliance_software to a higher version than 8.0,8.0(2,8.0(3,8.0(4,8.0(5,8.0.2,8.0.3,8.0.4,8.0.5,8.1,8.2,8.2(1,8.2(2,8.2(3,8.2(3.9,8.2(4,8.2(4.1,8.2(4.4,8.2(5,8.2.1,8.2.2,8.2.2:interim,8.2.3,8.3(1,8.3(2,8.3.1,8.3.1:interim,8.3.2,8.4,8.4(1,and avoid the version 8.0,8.0(2),8.0(3),8.0(4),8.0(5),8.0.2,8.0.3,8.0.4,8.0.5,8.1,8.2,8.2(1),8.2(2),8.2(3),8.2(3.9),8.2(4),8.2(4.1),8.2(4.4),8.2(5),8.2.1,8.2.2,8.2.2:interim,8.2.3,8.3(1),8.3(2),8.3.1,8.3.1:interim,8.3.2,8.4,8.4(1); Upgrade cisco adaptive_security_appliance to a higher version than *; Upgrade cisco asa_1000v_cloud_firewall to a higher version than -; Upgrade cisco asa_5500 to a higher version than *