CVE:CVE-2005-4351
CNNVD:CNNVD-200512-689
FreeBSD 7.0及更早版本、OpenBSD 3.8及之前版本、DragonFly 1.2及之前版本和Linux 2.6.15及之前版本所采用的securelevels使得root用户可以通过在系统运行时安装屏蔽了不可变文件的文件系统来绕过文件的不可变设置。
solution:Upgrade dragonfly dragonfly to a higher version than 1.2,and avoid the version (,1.2]; Upgrade freebsd freebsd to a higher version than *:stable,7.0:current,and avoid the version *:stable,7.0:current; Upgrade linux linux_kernel to a higher version than 2.6.15,and avoid the version (,2.6.15]; Upgrade openbsd openbsd to a higher version than 3.8,and avoid the version (,3.8]