CVE:CVE-2014-3347
CNNVD:CNNVD-201408-438
Cisco IOS on Cisco 1800 ISR是美国思科（Cisco）公司的一套运行于Cisco 1800 ISR系列路由器设备中的操作系统。
Cisco 1800 ISR设备上的Cisco IOS 15.1(4)M2版本中存在安全漏洞，该漏洞源于中断定时器碰撞使硬件加密模块进入损坏状态，导致设备失去响应。远程攻击者可通过已知的ISDN电话号码利用该漏洞造成拒绝服务（设备挂起）。
solution:Upgrade cisco ios to a higher version than 15.1(4m2,and avoid the version 15.1(4)m2; Upgrade cisco 1801_integrated_service_router to a higher version than -; Upgrade cisco 1802_integrated_service_router to a higher version than -; Upgrade cisco 1803_integrated_service_router to a higher version than -; Upgrade cisco 1811_integrated_service_router to a higher version than -; Upgrade cisco 1812_integrated_service_router to a higher version than -; Upgrade cisco 1841_integrated_service_router to a higher version than -; Upgrade cisco 1861_integrated_service_router to a higher version than -