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Reverse RDP Attack Also Enables Guest-to-Host Escape in Microsoft Hyper-V

Reverse RDP Attack Also Enables Guest-to-Host Escape in Microsoft Hyper-V

August 08, 2019Mohit Kumar
Remember the Reverse RDP Attack ? Earlier this year, researchers disclosed clipboard hijacking and path-traversal issues in Microsoft's Windows built-in RDP client that could allow a malicious RDP server to compromise a client computer, reversely. (You can find details and a video demonstration for this security vulnerability, along with dozens of critical flaws in other third-party RDP clients, in a previous article written by Swati Khandelwal for The Hacker News.) At the time when researchers responsibly reported this path-traversal issue to Microsoft, in October 2018, the company acknowledged the issue, also known as " Poisoned RDP vulnerability ," but decided not to address it. Now, it turns out that Microsoft silently patched this vulnerability  (CVE-2019-0887) just last month as part of its July Patch Tuesday updates after Eyal Itkin, security researcher at CheckPoint, found the same issue affecting Microsoft's Hyper-V technology as well. Microsoft
Warning: Critical WinRAR Flaw Affects All Versions Released In Last 19 Years

Warning: Critical WinRAR Flaw Affects All Versions Released In Last 19 Years

February 21, 2019Swati Khandelwal
Beware Windows users... a new dangerous remote code execution vulnerability has been discovered in the WinRAR software, affecting hundreds of millions of users worldwide. Cybersecurity researchers at Check Point have disclosed technical details of a critical vulnerability in WinRAR—a popular Windows file compression application with 500 million users worldwide—that affects all versions of the software released in last 19 years. The flaw resides in the way an old third-party library, called UNACEV2.DLL, used by the software handled the extraction of files compressed in ACE data compression archive file format. However, since WinRAR detects the format by the content of the file and not by the extension, attackers can merely change the .ace extension to .rar extension to make it look normal. According to researchers, they found an "Absolute Path Traversal" bug in the library that could be leveraged to execute arbitrary code on a targeted system attempting to uncompre
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