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Severe Privacy Vulnerability ‘Acropalypse’ Affects Windows 11 Snipping Tool

Severe Privacy Vulnerability ‘Acropalypse’ Affects Windows 11 Snipping ToolPost Views: 94 Premium Contenthttps://www.blackhatethicalhacking.com/wp-content/uploads/2022/12/Patreon.png Subscribe to Patreon to watch this episode.
Reading Time: 3 Minutes Acropalypse FlawMicrosoft’s Windows 11 Snipping Tool has been found to contain a severe privacy flaw named ‘acropalypse’. The flaw, which has already been discovered in Google Pixel’s Markup Tool, allows partially edited content to be recovered. Security researchers David Buchanan and Simon Aarons recently found that the original image data is retained even after editing or cropping out. The bug poses a significant privacy risk, as it can allow sensitive information, such as credit card numbers or revealing photos, to be partially recovered.

The researchers created an online screenshot recovery tool, acropalypse, which attempts to recover edited images created on Google Pixel.
See Also: So you want to be a hacker? Offensive Security, Bug Bounty Courses Acropalypse privacy flaw also affects the Windows 11 Snipping Tool.Today, software engineer Chris Blume confirmed that the acropalypse privacy flaw also affects the Windows 11 Snipping Tool. Overwriting an existing file in the tool leaves unused data behind, making it partially recoverable.
I've got a fun one for you all to look at.

I opened a 198 byte PNG with Microsoft's Snipping Tool, chose "Save As" to overwrite a different PNG file (no editing), and saves a 4,762 byte file with all that extra after the PNG IEND chunk.

Sounds similar 😀

— Chris Blume (@ProgramMax) March 21, 2023
To test this flaw, BleepingComputer opened an existing PNG file in the Windows 11 Snipping Tool, cropped it, and then saved the changes to the original file. Surprisingly, the file sizes for the original image file and the cropped image file were the same, indicating that unused data was not truncated, but left behind.

While the untruncated data may not be visible in an image viewer, it can be used to recreate sensitive portions of the original image. Buchanan shared a Python script with BleepingComputer that can be used to recover Windows files.
Trending: A primer on OS Command Injection Attacks Trending: Offensive Security Tool: Bypass Url Parser Recovery of sensitive informationEven though the online acropalypse screenshot recovery app does not currently work with Windows files, Buchanan warned that a potential privacy risk exists. Users may have sensitive information in screenshots that they cropped out, but this information can still be partially recovered by someone with the right tools.

Microsoft acknowledged the reports and stated that they are investigating the issue to protect their customers. However, the researchers noted that not all PNG files, such as optimized PNGs, are affected by this flaw. Additionally, opening an untruncated PNG file in an image editor and saving it to another file can strip off the unused data at the end, making it no longer recoverable.

The Windows 11 Snipping Tool also behaves similarly with JPG files, leaving untruncated data if overwritten. Buchanan warned that his exploit does not currently work on JPGs, but it could be possible.
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Black Hat Ethical Hacking Severe Privacy Vulnerability ‘Acropalypse’ Affects Windows 11 Snipping Tool Severe Privacy Vulnerability ‘Acropalypse’ Affects Windows 11 Snipping ToolPost Views: 94 Premium Contenthttps://www.blackhatethicalhacking.com/wp-conte…

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Smart Contract Audit Methodology & Tips

This blog outlines a methodology for auditing smart contracts and advice to help you become an efficient and effective auditor.Continue reading on Medium »
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Deep Web
Noob with questions

I'm completely new here but have a couple of questions. I've become interested in bugs and jammers at the hobby level. There isn't much about building these devices on the regular internet.

Would it be worth my while to setup an OS to search for this type of thing on the dark web? Not sure if that sort of thing is easier to find that way.

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Hacking Articles Tips Tricks Videos Tutorials

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KitPloit - PenTest Tools!
PortexAnalyzerGUI - Graphical Interface For PortEx, A Portable Executable And Malware Analysis Library

https://blogger.googleusercontent.com/img/a/AVvXsEirum9zKpcLFrGh5fJoP1uiH5A_Ax6MPAaUR-cOSMdenPaRW6-iWdMzF-r92KXtVR2vR8V0VDEk19hv3IROmro4xNBMZDk2lJGIYo4NKmwC_W0s8uH10WhFC129xms-aUy3M3UcvDl9Yr18rdQNs74Z3CjfcPrynuvekek8Ku3KBVcU5HV6_y3AAQ-QCA=w640-h358

https://blogger.googleusercontent.com/img/a/AVvXsEjih73UXzcD-FNzgIiV7kdqLcOX43bgwhFJMqa129v4rYxyxtiVqiaqgLUDit82fTVoIoyd3zwJWp-SAYVOWNnh1-FmYeUZxPtoStYMlqLacTxa7pXA08ZyS0CO2gFQu-HYOEKgEwrBkL376TROc7hLXMxKNosL2Gu_-keWXEPw_X-R7x5ScP9ikf9BBw=w640-h398

Graphical interface for PortEx, a Portable Executable and Malware Analysis Library

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Releases page

Features

* Header information from: MSDOS Header, Rich Header, COFF File Header, Optional Header, Section Table
* PE Structures: Import Section, Resource Section, Export Section, Debug Section
* Scanning for file format anomalies
* Visualize file structure, local entropies and byteplot, and save it as PNG
* Calculate Shannon Entropy, Imphash, MD5, SHA256, Rich and RichPV hash
* Overlay and overlay signature scanning
* Version information and manifest
* Icon extraction and saving as PNG
* Customized signature scanning via Yara. Internal signature scans using PEiD signatures and an internal filetype scanner.
Supported OS and JRE

I test this program on Linux and Windows. But it should work on any OS with JRE version 9 or higher.

Future

I will be including more and more features that PortEx already provides.

These features include among others:

* customized visualization
* extraction and conversion of icons to .ICO files
* dumping of sections, overlay, resources
* export reports to txt, json, csv

Some of these features are already provided by PortexAnalyzer CLI version, which you can find here: PortexAnalyzer CLI

Donations

I develop PortEx and PortexAnalyzer as a hobby in my free time. If you like it, please consider buying me a coffee: https://ko-fi.com/struppigel

Author

Karsten Hahn

Twitter: @Struppigel

Mastodon: struppigel@infosec.exchange

Youtube: MalwareAnalysisForHedgehogs

License

License
Download PortexAnalyzerGUI

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