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Embedded and IoT cable-connected devices running Microsoft's Windows 10 IoT Core are exposed to remote command execution attacks with SYSTEM privileges that require no authentication, with the help of an open source RAT tool released on GitHub. Windows 10 IoT Core-powered devices run a version of Windows 10 optimized for smaller ARM and x86/x64 devices, compatible with universal apps and drivers but with no support for shells or Microsoft apps. The SirepRAT tool developed by SafeBreach's Dor Azouri is designed to exploit the Sirep test service built-in "on any cable-connected device running Windows IoT Core with an official Microsoft image." The good news is that the SirepRAT Windows 10 IoT Core exploitation tool released by the researcher on GitHub will only work via an Ethernet connection because the less-known interface it exposes is "used by HLK for driver/HW tests" over wired connections. "The research was performed on a Windows IoT Core installed on a Raspberry Pi 3, but is probably not limited to this board as it abuses a Windows service and protocol, which should be platform independent," also says Azouri. "This service is the client part of the HLK setup one may build in order to perform driver/hardware tests on the IoT device. It serves the Sirep/WPCon/TShell protocol," according to Azouri. "We broke down the Sirep/WPCon protocol and demonstrated how this protocol exposes a remote command interface for attackers, that include RAT abilities such as get/put arbitrary files on arbitrary locations and obtain system information." The devices which can be exploited with the help of SirepRAT can be found in a multitude of environments, from commercial handheld products and DIY projects to enterprise environments. Learn more by visiting OUR FORUM. A program called Windows Exploit Suggester - Next Generation, or WES-NG, has been released that will list the known vulnerabilities affecting a Windows installation, any exploits that are available, and what security updates are needed to patch the bugs. WES-NG was created by security researcher Arris Huijgen, who based his project off the Windows-Exploit-Suggester program that was originally released in 2014 by GDS Security, now known as AON Security. The original program stopped working when Microsoft stopped updating its Microsoft Security Bulletin Data Excel file and switched to the Microsoft Security Response Center API. This program works by comparing a Windows SystemInfo report with a downloaded CSV file of known vulnerabilities and their associated security updates. Using this data, Windows Exploit Suggester will display a report showing all of the unpatched vulnerabilities found on the computer and their respective CVE IDs, Microsoft knowledge base article numbers, and a link to any known exploits for that vulnerability. According to the project's description, every version of Windows between Windows XP and Windows 10, including the Windows Server counterparts, is supported. For those who want to focus on specific vulnerabilities and filter out the rest, users can utilize the --hide flag to specify those vulnerabilities that should be filtered. For example, to filter out Edge vulnerabilities you can use the wes.py systeminfo.txt --hide Edge command. For more refer to OUR FORUM. Adobe today released emergency updates that fix a critical vulnerability for the ColdFusion web app development platform. The bug can lead to arbitrary code execution and has been exploited in the wild. The security issue allows an attacker to bypass restrictions for uploading files. To take advantage of it, the adversary has to be able to upload executable code to a directory of files on a web server. The code can then be executed via an HTTP request, Adobe says in its security bulletin. All ColdFusion versions that do not have the current updates are affected by the vulnerability (CVE-2019-7816), regardless of the platforms, they are for. Charlie Arehart, an independent consultant credited for reporting the vulnerability, told us that he discovered the bug when it was used against one of his clients. If applying the latest updates is not possible at the moment, one method to mitigate the risk is to create restrictions for requests to directories that store uploaded files. Developers should also modify their code to disallow executable extensions and check the list themselves, as is recommended by the Adobe Coldfusion guidelines. They also add the option "Blocked file extensions for CFFile uploads" to the server settings menu to create a list of extensions that should not be uploaded by the cffile tag/functions. More complete details are posted on OUR FORUM. |
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