Technical Description

A vulnerability has been identified in FreeBSD, which could be exploited by attackers to gain knowledge of sensitive information. This issue is caused by an error in the Neighbor Discovery Protocol (ndp) that does not properly verify neighbor solicitation requests, which could allow an attacker with IPv6 connectivity to the affected router to intercept traffic.

Affected Products

FreeBSD 6.3
FreeBSD 7.0

Solution

Apply patch for FreeBSD 6.3 :
# fetch http://security.FreeBSD.org/patches/SA-08:10/nd6-6.patch
# fetch http://security.FreeBSD.org/patches/SA-08:10/nd6-6.patch.asc

Apply patch for FreeBSD 7.0 :
# fetch http://security.FreeBSD.org/patches/SA-08:10/nd6-7.patch
# fetch http://security.FreeBSD.org/patches/SA-08:10/nd6-7.patch.asc

References

http://www.vupen.com/english/advisories/2008/2726
http://security.freebsd.org/advisories/FreeBSD-SA-08:10.nd6.asc

Credits

Vulnerability reported by David Miles.

ChangeLog

2008-10-06 : Initial release

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