CVE:CVE-2019-18849
CNNVD:CNNVD-201911-496
tnef是一款用于解压TNEF（Transport Neutral Encapsulation Format）格式文件的程序。
tnef 1.4.18之前版本中存在缓冲区错误漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
solution:Upgrade tnef_project tnef to a higher version than 1.4.18,and avoid the version (,1.4.18); Upgrade fedoraproject fedora to a higher version than 30,31,and avoid the version 30,31; Upgrade canonical ubuntu_linux to a higher version than 16.04,and avoid the version 16.04; Upgrade debian debian_linux to a higher version than 8.0,and avoid the version 8.0