Cyber Risks · Cisco Talos

Vulnerability Spotlight: FreeRDP Multiple Vulnerabilities

Summary: Cisco Talos discovered multiple vulnerabilities in FreeRDP, the open-source implementation of Microsoft's Remote Desktop Protocol, falling into two classes: client-side code execution via a specially crafted response from an RDP server, and termination of the FreeRDP client. The flaws stem from unchecked length fields in server-sent packets - in license server handling, the RDP received function, proprietary certificate parsing, security data handling, and license read product info and challenge packet handling - and an attacker can trigger them by compromising the server or using a man-in-the-middle attack.

Bottom line: FreeRDP is integrated into many commercial remote desktop applications, and the tested versions include FreeRDP 2.0.0-beta1+android11 on Windows, OSX and Linux - so a compromised or spoofed RDP server can push arbitrary code to the client side of any product built on this library.

Read the original at Cisco Talos ↗

Topics
Supply Chain & AppSec
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