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A vulnerability in Session Initiation Protocol (SIP) call handling in Cisco IP Phone 8800 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition because the SIP process unexpectedly restarts. All active phone calls are dropped as the SIP process restarts. The vulnerability is due to incomplete input validation of the SIP packet header. An attacker could exploit this vulnerability by sending a malformed SIP packet to a targeted phone. An exploit could allow the attacker to cause a DoS condition because all phone calls are dropped when the SIP process unexpectedly restarts. Cisco Bug IDs: CSCvc62590.

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输入验证不恰当

Cisco IP Phone 8800 Series设备安全漏洞

Cisco IP Phone 8800 Series devices是美国思科（Cisco）公司的一款提供视频和VoIP通信功能的IP电话。Session Initiation Protocol（SIP）是使用在其中的一个会话启动协议。 Cisco IP Phone 8800 Series设备中的Session Initiation Protocol (SIP)调用的处理存在拒绝服务漏洞，该漏洞源于程序没有对SIP数据包包头执行充分的输入验证。远程攻击者可通过向目标电话发送畸形的SIP数据包利用该漏洞造成

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