Date: Wed, 4 Apr 2018 17:00:18 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r332038 - stable/11/etc/rc.d Message-ID: <201804041700.w34H0Ipd019280@repo.freebsd.org>
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Author: kevans Date: Wed Apr 4 17:00:18 2018 New Revision: 332038 URL: https://svnweb.freebsd.org/changeset/base/332038 Log: MFC r328951: Refactor cleanvar to remove shell expansion vulnerability If any process creates a directory named "-P" in /var/run or /var/spool/lock it will cause the purgedir function to start to rm -r /. Simplify a lot of complicated shell logic by leveraging find(1). Modified: stable/11/etc/rc.d/cleanvar Directory Properties: stable/11/ (props changed) Modified: stable/11/etc/rc.d/cleanvar ============================================================================== --- stable/11/etc/rc.d/cleanvar Wed Apr 4 16:59:10 2018 (r332037) +++ stable/11/etc/rc.d/cleanvar Wed Apr 4 17:00:18 2018 (r332038) @@ -19,34 +19,6 @@ stop_cmd=":" extra_commands="reload" reload_cmd="${name}_start" -purgedir() -{ - local dir file - - if [ $# -eq 0 ]; then - purgedir . - else - for dir - do - ( - cd "$dir" && for file in .* * - do - # Skip over logging sockets - [ -S "$file" -a "$file" = "log" ] && continue - [ -S "$file" -a "$file" = "logpriv" ] && continue - [ ."$file" = .. -o ."$file" = ... ] && continue - if [ -d "$file" -a ! -L "$file" ] - then - purgedir "$file" - else - rm -f -- "$file" - fi - done - ) - done - fi -} - cleanvar_prestart() { # These files must be removed only the first time this script is run @@ -58,14 +30,17 @@ cleanvar_prestart() cleanvar_start() { if [ -d /var/run -a ! -f /var/run/clean_var ]; then - purgedir /var/run + # Skip over logging sockets + find /var/run \( -type f -or -type s ! -name log -and ! -name logpriv \) -delete >/var/run/clean_var fi if [ -d /var/spool/lock -a ! -f /var/spool/lock/clean_var ]; then - purgedir /var/spool/lock + find /var/spool/lock -type f -delete >/var/spool/lock/clean_var fi - rm -rf /var/spool/uucp/.Temp/* + if [ -d /var/spool/uucp/.Temp ]; then + find /var/spool/uucp/.Temp -delete + fi } load_rc_config $name
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