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TITLE:
FreeBSD ypserv Inoperative Access Controls Security Issue

SECUNIA ADVISORY ID:
SA20389

VERIFY ADVISORY:
http://secunia.com/advisories/20389/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From local network

OPERATING SYSTEM:
FreeBSD 5.x
http://secunia.com/product/1132/
FreeBSD 6.x
http://secunia.com/product/6778/

DESCRIPTION:
A security issue has been reported in FreeBSD, which can be exploited
by malicious people to bypass certain security restrictions.

The problem is caused due to an error in ypserv as the "securenets"
mechanism for restricting access to NIS maps is disabled.

SOLUTION:
Update FreeBSD or apply patches.

Fixed versions:
2006-05-31 22:31:21 UTC (RELENG_6, 6.1-STABLE)
2006-05-31 22:31:42 UTC (RELENG_6_1, 6.1-RELEASE-p1)
2006-05-31 22:32:04 UTC (RELENG_6_0, 6.0-RELEASE-p8)
2006-05-31 22:32:22 UTC (RELENG_5, 5.5-STABLE)
2006-05-31 22:32:49 UTC (RELENG_5_5, 5.5-RELEASE-p1)
2006-05-31 22:33:17 UTC (RELENG_5_4, 5.4-RELEASE-p15)
2006-05-31 22:33:41 UTC (RELENG_5_3, 5.3-RELEASE-p30)

Patch for FreeBSD 5.3, 5.4, 5.5, 6.0, and 6.1:
http://security.FreeBSD.org/patches/SA-06:15/ypserv.patch
http://security.FreeBSD.org/patches/SA-06:15/ypserv.patch.asc

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Hokan.

ORIGINAL ADVISORY:
http://security.freebsd.org/advisories/FreeBSD-SA-06:15.ypserv.asc

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