Secunia Security Advisory - A security issue has been reported in FreeBSD, which can be exploited by malicious, local users to bypass certain security restrictions.
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TITLE:
FreeBSD "SIOCSIFINFO_IN6" IOCTL Security Issue
SECUNIA ADVISORY ID:
SA35410
VERIFY ADVISORY:
http://secunia.com/advisories/35410/
DESCRIPTION:
A security issue has been reported in FreeBSD, which can be exploited
by malicious, local users to bypass certain security restrictions.
The security issue is caused due to missing permission checks for the
"SIOCSIFINFO_IN6" IOCTL. This can be exploited to change certain IPv6
interface settings (e.g. MTU) or disable an IPv6 interface completely
by sending specially crafted "SIOCSIFINFO_IN6" IOCTLs.
Note: IPv4 functionality is reportedly not affected.
SOLUTION:
Update FreeBSD or apply patches.
Fixed versions:
2009-06-10 10:31:11 UTC (RELENG_7, 7.2-STABLE)
2009-06-10 10:31:11 UTC (RELENG_7_2, 7.2-RELEASE-p1)
2009-06-10 10:31:11 UTC (RELENG_7_1, 7.1-RELEASE-p6)
2009-06-10 10:31:11 UTC (RELENG_6, 6.4-STABLE)
2009-06-10 10:31:11 UTC (RELENG_6_4, 6.4-RELEASE-p5)
2009-06-10 10:31:11 UTC (RELENG_6_3, 6.3-RELEASE-p11)
Patch for FreeBSD 6.x:
http://security.FreeBSD.org/patches/SA-09:10/ipv6-6.patch.asc
Patch for FreeBSD 7.x:
http://security.FreeBSD.org/patches/SA-09:10/ipv6.patch.asc
PROVIDED AND/OR DISCOVERED BY:
Hiroki Sato
ORIGINAL ADVISORY:
FreeBSD-SA-09:10.ipv6:
http://security.freebsd.org/advisories/FreeBSD-SA-09:10.ipv6.asc
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