kernfs_xread in kernfs_vnops.c in NetBSD before 20050831 does not check for a negative offset when reading the message buffer, which allows local users to read arbitrary kernel memory.Referenceshttp://securitytracker.com/id?1015132http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/kernfs/kernfs_vnops.c.diff?r1=1.110&r2=1.111&f=hhttp://releng.netbsd.org/cgi-bin/req-3.cgi?show=727http://www.osvdb.org/20729http://www.packetstormsecurity.org/0601-advisories/NetBSD-SA2006-001.txthttp://mail-index.netbsd.org/netbsd-announce/2005/10/31/0000.htmlhttp://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/kernfs/kernfs_vnops.c
