add timeout 120 when executing external binary

linPEAS/builder/linpeas_parts/functions/execBin.sh

@@ -2,7 +2,7 @@
 # ID: execBin
 # Author: Carlos Polop
 # Last Update: 22-08-2023
-# Description: Write and exected an embedded binary
+# Description: Write and execute an embedded binary
 # License: GNU GPL
 # Version: 1.0
 # Functions Used: print_3title, print_info
@@ -14,18 +14,41 @@
 
 
 execBin() {
-  TOOL_NAME=$1
+  TOOL_NAME=$1        # Display name
-  TOOL_LINK=$2
+  TOOL_LINK=$2        # Reference URL
-  B64_BIN=$3
+  B64_BIN=$3          # base64‑encoded executable
-  PARAMS=$4
+  PARAMS=$4           # Arguments to the tool
-  if [ "$B64_BIN" ]; then
+
-    echo ""
+  [ -z "$B64_BIN" ] && return 0   # nothing to do
+
+  echo
   print_3title "Running $TOOL_NAME"
   print_info  "$TOOL_LINK"
-    echo "$B64_BIN" | base64 -d > $Wfolder/bin
+
-    chmod +x $Wfolder/bin
+  TMP_BIN=$(mktemp "${Wfolder:-/tmp}/bin.XXXXXX") || { echo "mktemp failed"; return 1; }
-    eval "$Wfolder/bin $PARAMS"
+  printf '%s' "$B64_BIN" | base64 -d > "$TMP_BIN" || { echo "decode failed"; rm -f "$TMP_BIN"; return 1; }
-    rm -f $Wfolder/bin
+  chmod +x "$TMP_BIN"
-    echo ""
+
+  # ---------------- 120‑second wall‑clock timeout ----------------
+  if command -v timeout >/dev/null 2>&1; then                 # GNU/BSD timeout
+      timeout --preserve-status 120 "$TMP_BIN" $PARAMS
+  elif command -v gtimeout >/dev/null 2>&1; then              # Homebrew coreutils (macOS)
+      gtimeout --preserve-status 120 "$TMP_BIN" $PARAMS
+  else                                                        # POSIX fall‑back
+      (
+        "$TMP_BIN" $PARAMS &                                  # run in background
+        cmdpid=$!
+        ( sleep 120 && kill -0 "$cmdpid" 2>/dev/null && kill -TERM "$cmdpid" ) &
+        watcher=$!
+        wait "$cmdpid"
+        rc=$?
+        kill -9 "$watcher" 2>/dev/null
+        exit $rc
+      )
   fi
+  rc=$?
+
+  rm -f "$TMP_BIN"
+  echo
+  return $rc
 }