"Cisco 7940型IP电话是一种多功能通讯设备，通过IP网络传递语音信号。 Cisco 7940在处理特定的请求序列时存在漏洞，远程攻击者可能利用此漏洞导致设备不可用。 如果向Cisco 7940 IP电话发送了以下3个消息序列的话： X ------------------------- INVITE -----------------------> Cisco X <--- 481 transaction does not exists ----- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------------- OK ------------------------- Cisco X <--- 481 transaction does not exists ----- Cisco X ------------------------- OPTIONS--------------------> Cisco 或发送以下10个消息序列的话： X ------------------------- INVITE -----------------------> Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X...
"Cisco 7940型IP电话是一种多功能通讯设备，通过IP网络传递语音信号。 Cisco 7940在处理特定的请求序列时存在漏洞，远程攻击者可能利用此漏洞导致设备不可用。 如果向Cisco 7940 IP电话发送了以下3个消息序列的话： X ------------------------- INVITE -----------------------> Cisco X <--- 481 transaction does not exists ----- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------------- OK ------------------------- Cisco X <--- 481 transaction does not exists ----- Cisco X ------------------------- OPTIONS--------------------> Cisco 或发送以下10个消息序列的话： X ------------------------- INVITE -----------------------> Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X ------------------------- INVITE -----------------------> Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------- 404 Not Found ------------------ Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X <--------------- 400 Bad Request --------------- Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X ------------------------- INVITE -----------------------> Cisco X <----------------100 Trying ------------------------- Cisco X <--------------- 404 Not Found ------------------ Cisco X <--------------- 404 Not Found ------------------ Cisco X <--------------- 404 Not Found ------------------ Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X <--------------- 404 Not Found ------------------ Cisco X ------------------------- OPTIONS--------------------> Cisco X <--------------------- 200 OK ------------------------- Cisco X <--------------- 404 Not Found ------------------ Cisco 就会导致设备重启。 "
