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b68adff6b7
* All variables are now embraced: ${foo}
* All comparisons against some value now take the form:
[ "${foo}" ? "value" ]
where ? is a comparison operator
* All empty string tests now take the form:
[ -z "${foo}" ]
* All non-empty string tests now take the form:
[ -n "${foo}" ]
Submitted by: jkh
114 lines
2.8 KiB
Bash
114 lines
2.8 KiB
Bash
#!/bin/sh -
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#
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# @(#)security 5.3 (Berkeley) 5/28/91
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# $Id: security,v 1.30 1999/06/23 14:23:54 sheldonh Exp $
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#
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PATH=/sbin:/bin:/usr/bin
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LC_ALL=C; export LC_ALL
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separator () {
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echo ""
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echo ""
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}
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host=`hostname`
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echo "Subject: ${host} security check output"
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LOG=/var/log
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TMP=/var/run/_secure.$$
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umask 027
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echo "checking setuid files and devices:"
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# don't have ncheck, but this does the equivalent of the commented out block.
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# note that one of the original problem, the possibility of overrunning
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# the args to ls, is still here...
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#
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MP=`mount -t ufs | grep -v " nosuid" | sed 's;/dev/;&r;' | awk '{ print $3 }'`
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set ${MP}
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while test $# -ge 1; do
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mount=$1
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shift
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find $mount -xdev -type f \
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\( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
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\( -perm -u+s -or -perm -g+s \) -print0
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done | xargs -0 -n 20 ls -lTd | sort +9 > ${TMP}
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if [ ! -f ${LOG}/setuid.today ] ; then
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separator
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echo "no ${LOG}/setuid.today"
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cp ${TMP} ${LOG}/setuid.today
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fi
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if cmp ${LOG}/setuid.today ${TMP} >/dev/null; then :; else
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separator
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echo "${host} setuid diffs:"
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diff -b ${LOG}/setuid.today ${TMP}
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mv ${LOG}/setuid.today ${LOG}/setuid.yesterday
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mv ${TMP} ${LOG}/setuid.today
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fi
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separator
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echo "checking for uids of 0:"
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awk -F: '$3==0 {print $1,$3}' /etc/master.passwd
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separator
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echo "checking for passwordless accounts:"
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awk -F: '$1 !~ /^\+/ && $2=="" {print $0}' /etc/master.passwd
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# show denied packets
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if ipfw -a l 2>/dev/null | egrep "deny|reset|unreach" > ${TMP}; then
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if [ ! -f ${LOG}/ipfw.today ] ; then
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separator
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echo "no ${LOG}/ipfw.today"
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cp ${TMP} ${LOG}/ipfw.today
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fi
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if cmp ${LOG}/ipfw.today ${TMP} >/dev/null; then :; else
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separator
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echo "${host} denied packets:"
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diff -b ${LOG}/ipfw.today ${TMP} | egrep "^>"
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mv ${LOG}/ipfw.today ${LOG}/ipfw.yesterday
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mv ${TMP} ${LOG}/ipfw.today
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fi
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fi
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# show ipfw rules which have reached the log limit
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IPFW_LOG_LIMIT=`sysctl -n net.inet.ip.fw.verbose_limit 2> /dev/null`
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if [ $? -eq 0 ] && [ ${IPFW_LOG_LIMIT} -ne 0 ]; then
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ipfw -a l | grep " log " | perl -n -e \
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'/^\d+\s+(\d+)/; print if ($1 >= '$IPFW_LOG_LIMIT')' > ${TMP}
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if [ -s ${TMP} ]; then
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separator
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echo "ipfw log limit reached:"
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cat ${TMP}
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fi
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fi
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# show kernel log messages
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if dmesg 2>/dev/null > ${TMP}; then
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if [ ! -f ${LOG}/dmesg.today ] ; then
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separator
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echo "no ${LOG}/dmesg.today"
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cp ${TMP} ${LOG}/dmesg.today
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fi
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if cmp ${LOG}/dmesg.today ${TMP} >/dev/null 2>&1; then :; else
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separator
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echo "${host} kernel log messages:"
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diff -b ${LOG}/dmesg.today ${TMP} | egrep "^>"
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mv ${LOG}/dmesg.today ${LOG}/dmesg.yesterday
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mv ${TMP} ${LOG}/dmesg.today
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fi
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fi
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# show login failures
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separator
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echo "${host} login failures:"
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grep -i "login failure" ${LOG}/messages
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# show tcp_wrapper warning messages
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separator
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echo "${host} refused connections:"
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grep -i "refused connect" ${LOG}/messages
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rm -f ${TMP}
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