CVE:CVE-2020-12783
CNNVD:CNNVD-202005-406
Exim是一个运行于Unix系统中的开源消息传送代理（MTA），它主要负责邮件的路由、转发和投递。
Exim 4.93及之前版本中的SPA authenticator存在缓冲区错误漏洞。攻击者可利用该漏洞绕过身份验证。
solution:Upgrade exim exim to a higher version than 4.93,and avoid the version (,4.93]; Upgrade fedoraproject fedora to a higher version than 31,32,and avoid the version 31,32; Upgrade debian debian_linux to a higher version than 8.0,9.0,10.0,and avoid the version 8.0,9.0,10.0; Upgrade canonical ubuntu_linux to a higher version than 14.04,16.04,18.04,19.10,20.04,and avoid the version 14.04,16.04,18.04,19.10,20.04