CVE:CVE-2019-18976
CNNVD:CNNVD-201911-1292
Sangoma Technologies Asterisk和Sangoma Technologies Certified Asterisk都是加拿大Sangoma Technologies公司的产品。Sangoma Technologies Asterisk是一套开源电话交换机（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 Certified Asterisk是Asterisk的分支版本。
Sangoma Technologies Asterisk 13.x及之前版本和Sangoma Technologies Certified Asterisk 13.21-x及之前版本中的res_pjsip_t38.c文件存在代码问题漏洞。远程攻击者可利用该漏洞造成拒绝服务。
solution:Upgrade digium asterisk to a higher version than 13.29.1,and avoid the version [13.0.0,13.29.1]; Upgrade digium certified_asterisk to a higher version than 13.21,13.21:cert1,13.21:cert2,13.21:cert3,13.21:cert4,and avoid the version 13.21,13.21:cert1,13.21:cert2,13.21:cert3,13.21:cert4; Upgrade debian debian_linux to a higher version than 9.0,and avoid the version 9.0