CVE:CVE-2021-3403
CNNVD:CNNVD-202103-343
ytnef是一款用于winmail.dat文件的TNEF（传输中性封装格式）流阅读器。
ytnef 1.9.3 存在安全漏洞，该漏洞源于TNEFSubjectHandler函数，远程攻击者可利用该漏洞导致拒绝服务。
solution:Upgrade ytnef_project ytnef to a higher version than 1.9.3,and avoid the version 1.9.3; Upgrade redhat enterprise_linux to a higher version than 7.0,and avoid the version 7.0; Upgrade fedoraproject fedora to a higher version than 33,and avoid the version 33