CVE-2011-1739 Information

Description

The makemask function in mountd.c in mountd in FreeBSD 7.4 through 8.2 does not properly handle a -network field specifying a CIDR block with a prefix length that is not an integer multiple of 8 which allows remote attackers to bypass intended access restrictions in opportunistic circumstances via an NFS mount request.

Reference

http://secunia.com/advisories/44307 http://security.FreeBSD.org/advisories/FreeBSD-SA-11:01.mountd.asc http://securitytracker.com/id?1025425 http://www.securityfocus.com/bid/47517 http://www.vupen.com/english/advisories/2011/1076 https://exchange.xforce.ibmcloud.com/vulnerabilities/66981