CVE:CVE-2012-3017
CNNVD:CNNVD-201207-597
Siemens SIMATIC S7-400 PN CPU固件设备5.x版本中存在漏洞。远程攻击者可利用该漏洞通过（1）恶意的HTTP流量（2）恶意的IP数据包，导致拒绝服务（缺陷模式过度和服务中断）。
solution:Upgrade siemens simatic_s7-400_cpu_firmware to a higher version than 5.0,and avoid the version 5.0; Upgrade siemens simatic_s7-400_cpu_414-3_pn/dp to a higher version than *; Upgrade siemens simatic_s7-400_cpu_416-3_pn/dp to a higher version than *; Upgrade siemens simatic_s7-400_cpu_416f-3_pn/dp to a higher version than *