Ensure CDE daemons have sgid and suid mode disabled

높음레벨 1자동aix

설명

CDE buffer overflow vulnerabilities may be exploited by a local user to obtain root privilege via suid/sgid programs owned by root:bin or root:sys. CDE has been associated with major security risks, most of which are buffer overflow vulnerabilities. These vulnerabilities may be exploited by a local user to obtain root privilege via suid/sgid programs owned by root:bin or root:sys. Audit: compares `ls -ld` mode (or more restrictive), owner and group; an absent file is compliant.

점검 방법

감사 방식: 셸 명령

shell

r=compliant; for f in /usr/dt/bin/dtaction; do if [ -e "$f" ]; then set -- $(ls -ld "$f"); s=$(printf '%s %s %s\n' "$1" "$3" "$4" | awk -v m='r-xr-xr-x' -v o='root' -v g='sys' '{ok=1; for(i=1;i<=9;i++) if(substr(m,i,1)=="-" && substr($1,i+1,1)!="-") ok=0; if(o!="" && $2 !~ ("^(" o ")$")) ok=0; if(g!="" && $3 !~ ("^(" g ")$")) ok=0; print (ok ? "ok" : $0)}'); [ "$s" = ok ] || r="$f: $s"; else :; fi; done; for f in /usr/dt/bin/dtappgather; do if [ -e "$f" ]; then set -- $(ls -ld "$f"); s=$(printf '%s %s %s\n' "$1" "$3" "$4" | awk -v m='r-xr-xr-x' -v o='root' -v g='bin' '{ok=1; for(i=1;i<=9;i++) if(substr(m,i,1)=="-" && substr($1,i+1,1)!="-") ok=0; if(o!="" && $2 !~ ("^(" o ")$")) ok=0; if(g!="" && $3 !~ ("^(" g ")$")) ok=0; print (ok ? "ok" : $0)}'); [ "$s" = ok ] || r="$f: $s"; else :; fi; done; for f in /usr/dt/bin/dtprintinfo; do if [ -e "$f" ]; then set -- $(ls -ld "$f"); s=$(printf '%s %s %s\n' "$1" "$3" "$4" | awk -v m='r-xr-xr-x' -v o='root' -v g='bin' '{ok=1; for(i=1;i<=9;i++) if(substr(m,i,1)=="-" && substr($1,i+1,1)!="-") ok=0; if(o!="" && $2 !~ ("^(" o ")$")) ok=0; if(g!="" && $3 !~ ("^(" g ")$")) ok=0; print (ok ? "ok" : $0)}'); [ "$s" = ok ] || r="$f: $s"; else :; fi; done; for f in /usr/dt/bin/dtsession; do if [ -e "$f" ]; then set -- $(ls -ld "$f"); s=$(printf '%s %s %s\n' "$1" "$3" "$4" | awk -v m='r-xr-xr-x' -v o='root' -v g='bin' '{ok=1; for(i=1;i<=9;i++) if(substr(m,i,1)=="-" && substr($1,i+1,1)!="-") ok=0; if(o!="" && $2 !~ ("^(" o ")$")) ok=0; if(g!="" && $3 !~ ("^(" g ")$")) ok=0; print (ok ? "ok" : $0)}'); [ "$s" = ok ] || r="$f: $s"; else :; fi; done; echo "$r"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Remove the suid/sgid from the following CDE binaries: chmod ug-s /usr/dt/bin/dtaction chmod ug-s /usr/dt/bin/dtappgather chmod ug-s /usr/dt/bin/dtprintinfo chmod ug-s /usr/dt/bin/dtsession

속성

운영 체제: 모두
태그: aixservices
참고 자료: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.1.5 Ensure CDE daemons have sgid and suid mode disabled

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