CVE:CVE-2019-18790
CNNVD:CNNVD-201911-1291
Digium Certified Asterisk是美国Digium公司的一套开源的电话交换机（PBX）系统软件。该软件支持语音信箱、多方语音会议、交互式语音应答(IVR)等。
Sangoma Technologies Asterisk和Sangoma Technologies Certified Asterisk中的channels/chan_sip.c文件存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。以下产品及版本受到影响：Sangoma Technologies Asterisk 13.x版本，16.x版本，17.x版本；Sangoma Technologies Certified Asterisk 13.21版本。
solution:Upgrade digium asterisk to a higher version than 13.29.2,16.6.2,17.0.1,and avoid the version [13.0.0,13.29.2),[16.0.0,16.6.2),[17.0.0,17.0.1); Upgrade digium certified_asterisk to a higher version than 13.21.0,13.21.0:cert1,13.21.0:cert2,13.21.0:cert3,13.21.0:cert4,13.21.0:rc1,and avoid the version 13.21.0,13.21.0:cert1,13.21.0:cert2,13.21.0:cert3,13.21.0:cert4,13.21.0:rc1; Upgrade debian debian_linux to a higher version than 8.0,9.0,and avoid the version 8.0,9.0