f

linPEAS/builder/linpeas_parts/1_system_information/16_Protections.sh

@@ -127,6 +127,22 @@ else
     if [ "$ptrace_scope" -eq 0 ]; then echo "0" | sed -${E} "s,0,${SED_RED},"; else echo "$ptrace_scope" | sed -${E} "s,.*,${SED_GREEN},g"; fi
 fi
 
+print_list "protected_symlinks? ............ "$NC
+protected_symlinks=$(cat /proc/sys/fs/protected_symlinks 2>/dev/null)
+if [ -z "$protected_symlinks" ]; then
+    echo_not_found "/proc/sys/fs/protected_symlinks"
+else
+    if [ "$protected_symlinks" -eq 0 ]; then echo "0" | sed -${E} "s,0,${SED_RED},"; else echo "$protected_symlinks" | sed -${E} "s,.*,${SED_GREEN},g"; fi
+fi
+
+print_list "protected_hardlinks? ........... "$NC
+protected_hardlinks=$(cat /proc/sys/fs/protected_hardlinks 2>/dev/null)
+if [ -z "$protected_hardlinks" ]; then
+    echo_not_found "/proc/sys/fs/protected_hardlinks"
+else
+    if [ "$protected_hardlinks" -eq 0 ]; then echo "0" | sed -${E} "s,0,${SED_RED},"; else echo "$protected_hardlinks" | sed -${E} "s,.*,${SED_GREEN},g"; fi
+fi
+
 print_list "perf_event_paranoid? ........... "$NC
 perf_event_paranoid=$(cat /proc/sys/kernel/perf_event_paranoid 2>/dev/null)
 if [ -z "$perf_event_paranoid" ]; then

linPEAS/builder/linpeas_parts/1_system_information/9_Disks_extra.sh

@@ -4,6 +4,7 @@
 # Last Update: 07-03-2024
 # Description: Check for additional disk information and system resources relevant to privilege escalation:
 #   - Disk utilization
+#   - Inode usage
 #   - System resources
 #   - Storage statistics
 #   - Common vulnerable scenarios:
@@ -44,4 +45,8 @@ if [ "$EXTRA_CHECKS" ] || [ "$DEBUG" ]; then
     (df -h || lsblk) 2>/dev/null || echo_not_found "df and lsblk"
     warn_exec free 2>/dev/null
     echo ""
-fi
+
+    print_2title "Inode usage"
+    warn_exec df -i 2>/dev/null
+    echo ""
+fi

linPEAS/builder/linpeas_parts/4_procs_crons_timers_srvcs_sockets/17_Deleted_open_files.sh

@@ -0,0 +1,25 @@
+# Title: Processes & Cron & Services & Timers - Deleted open files
+# ID: PR_Deleted_open_files
+# Author: Carlos Polop
+# Last Update: 2025-01-07
+# Description: Identify deleted files still held open by running processes
+# License: GNU GPL
+# Version: 1.0
+# Functions Used: print_2title, print_info
+# Global Variables: $DEBUG, $EXTRA_CHECKS, $E, $SED_RED
+# Initial Functions:
+# Generated Global Variables:
+# Fat linpeas: 0
+# Small linpeas: 1
+
+if [ "$(command -v lsof 2>/dev/null || echo -n '')" ] || [ "$DEBUG" ]; then
+    print_2title "Deleted files still open"
+    print_info "Open deleted files can hide tools and still consume disk space"
+    lsof +L1 2>/dev/null | sed -${E} "s,\\(deleted\\),${SED_RED},g"
+    echo ""
+elif [ "$EXTRA_CHECKS" ] || [ "$DEBUG" ]; then
+    print_2title "Deleted files still open"
+    print_info "lsof not found, scanning /proc for deleted file descriptors"
+    ls -l /proc/[0-9]*/fd 2>/dev/null | grep "(deleted)" | sed -${E} "s,\\(deleted\\),${SED_RED},g" | head -n 200
+    echo ""
+fi

linPEAS/builder/linpeas_parts/4_procs_crons_timers_srvcs_sockets/7_Cron_jobs.sh

@@ -23,6 +23,7 @@ if ! [ "$SEARCH_IN_FOLDER" ]; then
   incrontab -l 2>/dev/null
   ls -alR /etc/cron* /var/spool/cron/crontabs /var/spool/anacron 2>/dev/null | sed -${E} "s,$cronjobsG,${SED_GREEN},g" | sed "s,$cronjobsB,${SED_RED},g"
   cat /etc/cron* /etc/at* /etc/anacrontab /var/spool/cron/crontabs/* /etc/incron.d/* /var/spool/incron/* 2>/dev/null | tr -d "\r" | grep -v "^#" | sed -${E} "s,$Wfolders,${SED_RED_YELLOW},g" | sed -${E} "s,$sh_usrs,${SED_LIGHT_CYAN}," | sed "s,$USER,${SED_LIGHT_MAGENTA}," | sed -${E} "s,$nosh_usrs,${SED_BLUE},"  | sed "s,root,${SED_RED},"
+  grep -Hn '^PATH=' /etc/crontab /etc/cron.d/* 2>/dev/null | sed -${E} "s,$Wfolders,${SED_RED_YELLOW},g"
   crontab -l -u "$USER" 2>/dev/null | tr -d "\r"
   ls -lR /usr/lib/cron/tabs/ /private/var/at/jobs /var/at/tabs/ /etc/periodic/ 2>/dev/null | sed -${E} "s,$cronjobsG,${SED_GREEN},g" | sed "s,$cronjobsB,${SED_RED},g" #MacOS paths
   atq 2>/dev/null
@@ -247,4 +248,4 @@ else
   print_info "https://book.hacktricks.wiki/en/linux-hardening/privilege-escalation/index.html#scheduledcron-jobs"
   find "$SEARCH_IN_FOLDER" '(' -type d -or -type f ')' '(' -name "cron*" -or -name "anacron" -or -name "anacrontab" -or -name "incron.d" -or -name "incron" -or -name "at" -or -name "periodic" ')' -exec echo {} \; -exec ls -lR {} \;
 fi
-echo ""
+echo ""