WinRAR  - WINRAR - ulnerability in WinRAR Allows Attackers to Compromise victim’s Computer

A critical old Remote Code Execution bug puts 500 million users worldwide at risk. The vulnerability remains undetected for 19 years.

researchers from Checkpoint published the technical details of the critical vulnerability that exists in the most popular .

Based on the crash tests researchers detected an old DLL library that compiled back in 2006 without any validation mechanism.”After researching this behavior, we found a logical bug: Absolute Path Traversal. From this point on it was simple to leverage this vulnerability to remote code execution.”

The vulnerability resides in the unacev2.dll that used in handling the ACE archive extraction. The ACE file format compiled using WinACE.

The path traversal vulnerability exists in the DLL file allows placing the Startup Folder instead of the destination folder.

Researchers changed the .ace extension to .rar extension as the WinRAR detects the file based on content and not by the formats. This makes the malicious executable to trigger automatically on system reboot.

Once the malware executed the can gain access to complete control over the . Here is the POC published by Checkpoint research.

“We can gain code execution, by extracting a compressed executable file from the ACE archive to one of the Startup Folders. Any files that reside in the Startup folders will be executed at boot time.”

The vulnerability has fixed with WinRAR version 5.70 beta 1 as the ACE archive format not supported anymore.

Here you can find the complete technical analysis which is done by the checkpoint security researchers.

You can follow us on LinkedinTwitterFacebook for daily updates also you can take the Best Cybersecurity courses online to keep your self-updated.

Related Read

Millions of Devices Found Running Outdated Versions of the Famous Softwares

Hackers Exploiting Adobe Flash Zero-Day that Launching via a Microsoft Office Document





Source link

LEAVE A REPLY

Please enter your comment!
Please enter your name here