CVE:CVE-2009-2208
CNNVD:CNNVD-200906-397
FreeBSD 6.3版本,6.4版本,7.1版本,以及7.2版本没有在SIOCSIFINFO_IN6 IOCTL强制需要许可证明，这会允许本地用户修改或中止IPv6网络界面, 例如修改MTU。
solution:Upgrade freebsd freebsd to a higher version than 6.3,6.3:release_p10,6.3:release_p11,6.3:release_p6,6.3:release_p8,6.3:release_p9,6.3_releng,6.4,6.4:release,6.4:release_p2,6.4:release_p3,6.4:release_p4,6.4:release_p5,6.4:stable,7.1,7.1:pre-release,7.1:rc1,7.1:release-p1,7.1:release-p2,7.1:release-p4,7.1:release-p5,7.1:release-p6,7.1:stable,7.2,7.2:pre-release,7.2:stable,and avoid the version 6.3,6.3:release_p10,6.3:release_p11,6.3:release_p6,6.3:release_p8,6.3:release_p9,6.3_releng,6.4,6.4:release,6.4:release_p2,6.4:release_p3,6.4:release_p4,6.4:release_p5,6.4:stable,7.1,7.1:pre-release,7.1:rc1,7.1:release-p1,7.1:release-p2,7.1:release-p4,7.1:release-p5,7.1:release-p6,7.1:stable,7.2,7.2:pre-release,7.2:stable