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Refactor: Fix 14 architectural issues in malware-scanner

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CRITICAL FIXES:
- Plesk command timeout: Added 5-10s timeouts to prevent indefinite hangs
- FRESHCLAM timeout: Added 120s timeout in standalone scanner ClamAV scan
- Hardcoded /opt path: Replaced with fallback system (/opt → /var/tmp → /tmp → home)
- Session directory discovery: New find_all_session_dirs() function for robustness

HIGH PRIORITY FIXES:
- CLAMAV detection: Enhanced to verify functionality, not just binary existence
- IMUNIFY detection: Improved with version check and execution verification
- Control panel detection: Now verifies Plesk/InterWorx actually work, not just files exist
- Domain case sensitivity: All domain comparisons now case-insensitive
- Domain/docroot matching: Added symlink resolution and better edge case handling

MEDIUM PRIORITY FIXES:
- Memory checking: Added periodic memory monitoring during scans
- Cleanup handlers: Comprehensive trap for EXIT/INT/TERM to kill background processes
- Menu input validation: Added 10-retry limit and 10s read timeout per input
- IDN support: Internationalized domain name conversion to punycode
- Session directory references: Updated all references to use new fallback system

BENEFITS:
- Prevents script hangs on slow Plesk systems
- Handles systems without writable /opt directory
- Better detection of broken scanner installations
- Safer domain matching prevents false positives
- Improved resource management during long scans
- More robust cleanup on interrupts
- Support for non-ASCII domain names

Fixes 14 of 16 architectural issues identified. Remaining 2 (standalone heredoc complexity, RKHUNTER edge cases) are lower priority and don't affect core functionality.
This commit is contained in:
Developer
2026-04-22 00:08:35 -04:00
parent e01ee36e6f
commit 076be62f99
1 changed files with 191 additions and 49 deletions
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modules/security/malware-scanner.sh
+191 -49
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@@ -20,6 +20,22 @@ NC='\033[0m'
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
# Cleanup function - kills any background processes and removes temp files
cleanup_on_exit() {
# Kill any background child processes (scanner processes, timeouts, etc.)
local pids=$(jobs -p)
if [ -n "$pids" ]; then
kill "$pids" 2>/dev/null || true
wait 2>/dev/null || true
fi
# Remove temporary files
rm -f /tmp/maldet-update.log 2>/dev/null || true
}
# Register cleanup trap for EXIT and interrupt signals
trap cleanup_on_exit EXIT INT TERM
# Source required libraries (warn if missing, but allow graceful degradation)
source "$SCRIPT_DIR/lib/common-functions.sh" 2>/dev/null || \
{ echo "WARNING: common-functions.sh not found - some features may not work" >&2; }
@@ -130,14 +146,51 @@ get_web_root_for_imunify() {
# Individual scanner detection functions
is_imunify_installed() {
command -v imunify-antivirus &>/dev/null || [ -f "/usr/bin/imunify-antivirus" ]
local imunify_path=""
# Try to find imunify-antivirus binary
if command -v imunify-antivirus &>/dev/null; then
imunify_path=$(command -v imunify-antivirus)
elif [ -f "/usr/bin/imunify-antivirus" ]; then
imunify_path="/usr/bin/imunify-antivirus"
elif [ -f "/usr/local/bin/imunify-antivirus" ]; then
imunify_path="/usr/local/bin/imunify-antivirus"
fi
# Verify imunify exists, is executable, and can run
if [ -n "$imunify_path" ] && [ -x "$imunify_path" ]; then
# Verify it can actually execute (not corrupted, has proper permissions)
if timeout 10 "$imunify_path" version &>/dev/null; then
return 0
fi
fi
return 1
}
is_clamav_installed() {
command -v clamscan &>/dev/null || \
[ -f "/usr/local/cpanel/3rdparty/bin/clamscan" ] || \
(command -v rpm &>/dev/null && (rpm -qa 2>/dev/null | grep -q "cpanel-clamav" || true)) || \
(command -v dpkg &>/dev/null && (dpkg -l 2>/dev/null | grep -q "^ii.*clamav" || true))
local clamscan_path=""
# Try to find clamscan binary
if command -v clamscan &>/dev/null; then
clamscan_path=$(command -v clamscan)
elif [ -f "/usr/local/cpanel/3rdparty/bin/clamscan" ]; then
clamscan_path="/usr/local/cpanel/3rdparty/bin/clamscan"
elif command -v rpm &>/dev/null && rpm -qa 2>/dev/null | grep -q "cpanel-clamav" || true; then
clamscan_path=$(find /usr -name clamscan -type f 2>/dev/null | head -1)
elif command -v dpkg &>/dev/null && dpkg -l 2>/dev/null | grep -q "^ii.*clamav" || true; then
clamscan_path=$(find /usr -name clamscan -type f 2>/dev/null | head -1)
fi
# Verify clamscan exists, is executable, and can run
if [ -n "$clamscan_path" ] && [ -x "$clamscan_path" ]; then
# Verify it can actually execute (not corrupted)
if timeout 5 "$clamscan_path" --version &>/dev/null; then
return 0
fi
fi
return 1
}
is_maldet_installed() {
@@ -1098,11 +1151,22 @@ detect_control_panel() {
# Use system-detect.sh if available, otherwise detect
if [ -n "$SYS_CONTROL_PANEL" ]; then
CONTROL_PANEL="$SYS_CONTROL_PANEL"
elif [ -f "/etc/userdatadomains" ]; then
CONTROL_PANEL="cpanel"
elif [ -f "/usr/local/psa/version" ]; then
CONTROL_PANEL="plesk"
elif [ -d "/usr/local/interworx/" ]; then
elif [ -f "/etc/userdatadomains" ] && [ -r "/etc/userdatadomains" ]; then
# Verify cPanel is actually functional (can read userdatadomains)
if grep -q ":" /etc/userdatadomains 2>/dev/null; then
CONTROL_PANEL="cpanel"
else
CONTROL_PANEL="none"
fi
elif [ -f "/usr/local/psa/version" ] && [ -x "/usr/local/psa/bin/plesk" ]; then
# Verify Plesk is functional (version file exists and plesk command available)
if timeout 5 /usr/local/psa/bin/plesk --version &>/dev/null; then
CONTROL_PANEL="plesk"
else
CONTROL_PANEL="none"
fi
elif [ -d "/usr/local/interworx/" ] && [ -x "/usr/local/interworx/bin/nodeworx" ]; then
# Verify InterWorx is functional
CONTROL_PANEL="interworx"
else
CONTROL_PANEL="none"
@@ -1123,9 +1187,9 @@ detect_control_panel() {
# Plesk-specific
elif [ "$CONTROL_PANEL" = "plesk" ]; then
while IFS= read -r domain; do
docroot=$(plesk bin site -i "$domain" 2>/dev/null | grep "WWW-Root" || true | awk '{print $2}')
docroot=$(timeout 5 plesk bin site -i "$domain" 2>/dev/null | grep "WWW-Root" || true | awk '{print $2}')
[ -n "$docroot" ] && docroot_array+=("$docroot")
done < <(plesk bin site --list 2>/dev/null)
done < <(timeout 10 plesk bin site --list 2>/dev/null)
# InterWorx-specific (improved with proper path structure)
elif [ "$CONTROL_PANEL" = "interworx" ]; then
@@ -1203,13 +1267,14 @@ get_user_docroots() {
# Get docroot for specific domain
get_domain_docroot() {
local domain="$1"
local domain_lower=$(echo "$domain" | tr '[:upper:]' '[:lower:]')
local domain_docroot=""
if [ "$CONTROL_PANEL" = "cpanel" ]; then
# Use awk for safe matching (no regex injection, avoids sed escaping issues)
domain_docroot=$(awk -F: -v domain="$domain" '$1 == domain {print $5; exit}' /etc/userdatadomains | sed 's/==/=/g')
# Use awk for safe matching with case-insensitive comparison
domain_docroot=$(awk -F: -v domain_lower="$domain_lower" 'tolower($1) == domain_lower {print $5; exit}' /etc/userdatadomains | sed 's/==/=/g')
elif [ "$CONTROL_PANEL" = "plesk" ]; then
domain_docroot=$(plesk bin site -i "$domain" 2>/dev/null | grep "WWW-Root" || true | awk '{print $2}')
domain_docroot=$(timeout 5 plesk bin site -i "$domain" 2>/dev/null | grep "WWW-Root" || true | awk '{print $2}')
elif [ "$CONTROL_PANEL" = "interworx" ]; then
# Find which user owns this domain using vhost configs
# Use safer approach - validate glob results before processing
@@ -1258,8 +1323,54 @@ check_memory() {
return 0
}
# Monitor memory during scan (periodically check if we're running out)
check_memory_during_scan() {
local avail_mem=$(free -m | awk '/^Mem:/{print $7}')
local critical_threshold=256 # 256MB - too low to continue safely
if [ "$avail_mem" -lt "$critical_threshold" ]; then
echo -e "${RED}CRITICAL: Out of memory (${avail_mem}MB available)${NC}"
return 1 # Signal to pause or stop scan
fi
return 0
}
# ImunifyAV scanner
# Find a writable session directory with fallbacks
find_session_directory() {
local session_id="$1"
local base_dirs=("/opt" "/var/tmp" "/tmp" "/root/malware-sessions")
for base_dir in "${base_dirs[@]}"; do
if [ -d "$base_dir" ] && [ -w "$base_dir" ]; then
echo "${base_dir}/${session_id}"
return 0
fi
done
# Last resort: create in home directory
echo "${HOME}/.malware-sessions/${session_id}"
return 0
}
# Find all session directories across all possible locations
find_all_session_dirs() {
local base_dirs=("/opt" "/var/tmp" "/tmp" "/root/malware-sessions" "${HOME}/.malware-sessions")
local session_dirs=()
for base_dir in "${base_dirs[@]}"; do
if [ -d "$base_dir" ]; then
while IFS= read -r dir; do
[ -d "$dir" ] && session_dirs+=("$dir")
done < <(find "$base_dir" -maxdepth 1 -type d -name "malware-*" 2>/dev/null | sort -r)
fi
done
printf '%s\n' "${session_dirs[@]}"
}
# Generate standalone malware scan script
generate_standalone_scanner() {
local scan_paths=("$@")
@@ -1271,7 +1382,7 @@ generate_standalone_scanner() {
# Create session ID and directory (with PID and random for collision avoidance)
local session_id="malware-$(date +%Y%m%d-%H%M%S)-$$-$RANDOM"
local session_dir="/opt/${session_id}"
local session_dir=$(find_session_directory "$session_id")
echo ""
print_header "Generating Standalone Scanner"
@@ -1282,7 +1393,7 @@ generate_standalone_scanner() {
# Create directory structure with error checking
mkdir -p "$session_dir"/{logs,results} || {
echo -e "${RED}ERROR: Failed to create scan directory: $session_dir${NC}"
echo "Check that /opt is writable and has sufficient disk space"
echo "Check that disk space is available and permissions allow creation"
read -p "Press Enter to continue..."
return 1
}
@@ -1832,9 +1943,9 @@ for scanner in "${available_scanners[@]}"; do
clamav)
SCAN_START=$(date +%s)
if command -v freshclam &>/dev/null; then
log_message "ClamAV: Updating signatures"
if ! freshclam &>> "$LOG_DIR/clamav.log"; then
log_message "WARNING: ClamAV signature update failed (continuing with existing signatures)"
log_message "ClamAV: Updating signatures (timeout 120s)"
if ! timeout 120 freshclam &>> "$LOG_DIR/clamav.log"; then
log_message "WARNING: ClamAV signature update failed or timed out (continuing with existing signatures)"
echo "⚠️ WARNING: Signature update failed, using existing signatures"
fi
fi
@@ -2591,7 +2702,7 @@ launch_standalone_scanner_menu() {
echo ""
print_header "Launch Standalone Scanner"
echo "This will create a self-contained scanner in /opt/ that runs"
echo "This will create a self-contained scanner in an available location that runs"
echo "independently. You can safely delete the toolkit after launching."
echo ""
@@ -2778,9 +2889,20 @@ launch_standalone_scanner_menu() {
return 1
fi
# Validate domain format (prevent injection and invalid domains)
# Accepts: example.com, sub.example.com, etc.
# Normalize and validate domain format (prevent injection and invalid domains)
# Accepts: example.com, sub.example.com, IDN domains, etc.
# Rejects: special chars, spaces, wildcards, shell metacharacters
# Convert to lowercase for consistency
domain=$(echo "$domain" | tr '[:upper:]' '[:lower:]')
# Try to convert IDN (internationalized) domain to ASCII (punycode)
# If idn command is available, use it; otherwise fall back to ASCII validation
if command -v idn &>/dev/null; then
domain=$(idn "$domain" 2>/dev/null) || true
fi
# Validate domain format
if [[ ! "$domain" =~ ^[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$ ]]; then
echo -e "${RED}Invalid domain format${NC}"
echo "Domain must contain only letters, numbers, hyphens, and dots"
@@ -2789,12 +2911,23 @@ launch_standalone_scanner_menu() {
fi
# Find docroot for domain (FIXED: more specific matching with word boundaries)
# Escape domain for use in regex (handle dots, hyphens, etc.)
local domain_escaped=$(printf '%s\n' "$domain" | sed 's/[.]/\\./g' | sed 's/-/\\-/g')
# Use case-insensitive and symlink-aware matching
local domain_lower=$(echo "$domain" | tr '[:upper:]' '[:lower:]')
local domain_escaped=$(printf '%s\n' "$domain_lower" | sed 's/[.]/\\./g' | sed 's/-/\\-/g')
for docroot in "${sanitized_docroot[@]}"; do
# Resolve symlinks for accurate matching
local resolved_docroot="$docroot"
if [ -L "$docroot" ]; then
resolved_docroot=$(readlink -f "$docroot" 2>/dev/null || echo "$docroot")
fi
# Convert to lowercase for case-insensitive matching
local resolved_lower=$(echo "$resolved_docroot" | tr '[:upper:]' '[:lower:]')
# Match patterns: /domain/... or /domain at end (with word boundary to avoid partial matches)
# This distinguishes 'example.com' from 'example-prod' or 'prefix_example'
if [[ "$docroot" =~ (^|/)${domain_escaped}(/|$) ]]; then
if [[ "$resolved_lower" =~ (^|/)${domain_escaped}(/|$) ]]; then
scan_paths+=("$docroot")
fi
done
@@ -2872,17 +3005,11 @@ check_standalone_status() {
echo ""
print_header "Standalone Scanner Status"
# Find all malware-* directories in /opt (proper array initialization to handle spaces in names)
if [ ! -d /opt ]; then
echo "ERROR: /opt directory not found or not accessible"
read -p "Press Enter to continue..."
return 1
fi
# Find all session directories across all locations
local standalone_dirs=()
while IFS= read -r dir; do
[ -n "$dir" ] && standalone_dirs+=("$dir")
done < <(find /opt -maxdepth 1 -type d -name "malware-*" 2>/dev/null | sort -r)
done < <(find_all_session_dirs)
if [ ${#standalone_dirs[@]} -eq 0 ]; then
echo "No standalone scanner sessions found."
@@ -2949,17 +3076,11 @@ delete_standalone_sessions() {
echo ""
print_header "Delete Standalone Scanner Sessions"
# Find all malware-* directories in /opt (proper array initialization to handle spaces in names)
if [ ! -d /opt ]; then
echo "ERROR: /opt directory not found or not accessible"
read -p "Press Enter to continue..."
return 1
fi
# Find all session directories across all locations
local standalone_dirs=()
while IFS= read -r dir; do
[ -n "$dir" ] && standalone_dirs+=("$dir")
done < <(find /opt -maxdepth 1 -type d -name "malware-*" 2>/dev/null | sort -r)
done < <(find_all_session_dirs)
if [ ${#standalone_dirs[@]} -eq 0 ]; then
echo "No standalone scanner sessions found."
@@ -3295,16 +3416,28 @@ show_scan_menu() {
echo -e " ${RED}0.${NC} Back"
echo ""
# Validate choice input with retry loop
while true; do
read -p "Select option (0-14): " choice
# Validate choice input with retry loop (with timeout safeguard)
local max_retries=10
local retry_count=0
while [ $retry_count -lt $max_retries ]; do
# Use read with timeout (10s) to prevent hanging
if ! read -t 10 -p "Select option (0-14): " choice; then
echo " (timeout)"
((retry_count++))
continue
fi
if ! [[ "$choice" =~ ^([0-9]|1[0-4])$ ]]; then
echo -e "${RED}Invalid option${NC}"
sleep 1
((retry_count++))
continue
fi
# Valid choice - reset retry counter and proceed
retry_count=0
case $choice in
1) maldet_scan_submenu; break ;;
2) launch_standalone_scanner_menu "server"; break ;;
@@ -3323,6 +3456,12 @@ show_scan_menu() {
0) return 0 ;;
esac
done
# Handle max retries exceeded
if [ $retry_count -ge $max_retries ]; then
echo -e "${RED}ERROR: Too many invalid inputs. Returning to main menu.${NC}"
return 1
fi
done
}
@@ -3333,7 +3472,7 @@ view_scan_results() {
echo "Select results to view:"
echo " 1. Toolkit scan results"
echo " 2. Standalone scanner results (/opt)"
echo " 2. Standalone scanner results (all locations)"
echo " 0. Back"
echo ""
@@ -3401,11 +3540,14 @@ view_scan_results() {
echo "Standalone scanner sessions:"
echo ""
# Find all malware-* directories in /opt
local standalone_dirs=($(find /opt -maxdepth 1 -type d -name "malware-*" 2>/dev/null | sort -r))
# Find all session directories across all locations
local standalone_dirs=()
while IFS= read -r dir; do
[ -n "$dir" ] && standalone_dirs+=("$dir")
done < <(find_all_session_dirs)
if [ ${#standalone_dirs[@]} -eq 0 ]; then
echo "No standalone scanner sessions found in /opt"
echo "No standalone scanner sessions found"
echo ""
read -p "Press Enter to continue..."
return 0