Date: Sun, 6 Feb 2011 13:59:04 +0000 (UTC) From: Brooks Davis <brooks@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r218372 - in stable/8: etc/defaults etc/periodic/security share/man/man5 Message-ID: <201102061359.p16Dx4WU067003@svn.freebsd.org>
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Author: brooks Date: Sun Feb 6 13:59:03 2011 New Revision: 218372 URL: http://svn.freebsd.org/changeset/base/218372 Log: MFC r215213: Add an (off by default) check for negative permissions (where the group on a object has less permissions than everyone). These permissions will not work reliably over NFS if you have more than 14 supplemental groups and are usually not what you mean. Added: stable/8/etc/periodic/security/110.neggrpperm - copied unchanged from r215213, head/etc/periodic/security/110.neggrpperm Modified: stable/8/etc/defaults/periodic.conf stable/8/etc/periodic/security/Makefile stable/8/share/man/man5/periodic.conf.5 Directory Properties: stable/8/etc/ (props changed) stable/8/share/man/man5/ (props changed) Modified: stable/8/etc/defaults/periodic.conf ============================================================================== --- stable/8/etc/defaults/periodic.conf Sun Feb 6 13:17:40 2011 (r218371) +++ stable/8/etc/defaults/periodic.conf Sun Feb 6 13:59:03 2011 (r218372) @@ -157,6 +157,9 @@ daily_status_security_diff_flags="-b -u" # 100.chksetuid daily_status_security_chksetuid_enable="YES" +# 110.neggrpperm +daily_status_security_neggrpperm_enable="NO" + # 200.chkmounts daily_status_security_chkmounts_enable="YES" #daily_status_security_chkmounts_ignore="^amd:" # Don't check matching Copied: stable/8/etc/periodic/security/110.neggrpperm (from r215213, head/etc/periodic/security/110.neggrpperm) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/8/etc/periodic/security/110.neggrpperm Sun Feb 6 13:59:03 2011 (r218372, copy of r215213, head/etc/periodic/security/110.neggrpperm) @@ -0,0 +1,54 @@ +#!/bin/sh - +# +# Copyright (c) 2001 The FreeBSD Project +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# +# $FreeBSD$ +# + +# If there is a global system configuration file, suck it in. +# +if [ -r /etc/defaults/periodic.conf ] +then + . /etc/defaults/periodic.conf + source_periodic_confs +fi + +rc=0 + +case "$daily_status_security_neggrpperm_enable" in + [Yy][Ee][Ss]) + echo "" + echo 'Checking negative group permissions:' + MP=`mount -t ufs,zfs | awk '$0 !~ /no(suid|exec)/ { print $3 }'` + n=$(find -sx $MP /dev/null -type f \ + \( \( ! -perm +010 -and -perm +001 \) -or \ + \( ! -perm +020 -and -perm +002 \) -or \ + \( ! -perm +040 -and -perm +004 \) \) \ + -exec ls -liTd \{\} \+ | tee /dev/stderr | wc -l) + [ $n -gt 0 ] && rc=1 || rc=0 + ;; +esac + +exit $rc Modified: stable/8/etc/periodic/security/Makefile ============================================================================== --- stable/8/etc/periodic/security/Makefile Sun Feb 6 13:17:40 2011 (r218371) +++ stable/8/etc/periodic/security/Makefile Sun Feb 6 13:59:03 2011 (r218372) @@ -3,6 +3,7 @@ .include <bsd.own.mk> FILES= 100.chksetuid \ + 110.neggrpperm \ 200.chkmounts \ 300.chkuid0 \ 400.passwdless \ Modified: stable/8/share/man/man5/periodic.conf.5 ============================================================================== --- stable/8/share/man/man5/periodic.conf.5 Sun Feb 6 13:17:40 2011 (r218371) +++ stable/8/share/man/man5/periodic.conf.5 Sun Feb 6 13:59:03 2011 (r218372) @@ -482,6 +482,14 @@ Set to .Dq Li YES to compare the modes and modification times of setuid executables with the previous day's values. +.It Va daily_status_security_neggrpperm_enable +.Pq Vt bool +Set to +.Dq Li YES +to check for files where the group of a file has less permissions than +the world at large. +When users are in more than 14 supplemental groups these negative +permissions may not be enforced via NFS shares. .It Va daily_status_security_chkmounts_enable .Pq Vt bool Set to
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