CVE:CVE-2006-6680
CNNVD:CNNVD-200612-477
Pedro Lineu Orso chetcpasswd的2.3.1之前版本未记录/etc/chetcpasswd.allow的0400许可需要，本地用户可能通过读取该文件来获取敏感信息。
solution:Upgrade chetcpasswd chetcpasswd to a higher version than 2.2.1,and avoid the version 2.2.1