A critical vulnerability, identified and cataloged as CVE-2023-38831, has been discovered. This vulnerability allows attackers to create modified RAR or ZIP archives that contain both harmless files and malicious ones. The malicious files are typically scripts located within a folder that shares the same name as the harmless file.



WinRAR RCE before versions 6.23



The method exportXFAData has inadvertently exposed a dangerous loophole that can allow a remote attacker to execute arbitrary code on the victim's system. The exploitation process requires the victim's interaction, meaning a potential attacker would need to convince the target to visit a malicious web page or open a corrupted file. The victim's susceptibility to social engineering thus significantly increases the risk factor of this vulnerability.
This is a critical vulnerability in the MSHTML rendering engine. Microsoft Office applications use the MSHTML engine to process and display web content. An adversary who successfully exploits could achieve full control over a target system by using malicious ActiveX controls to execute arbitrary code.



This Update contains the following improvements:



-Default Connection method was changed to HTTPS

-Early Release Warning was removed

-Several "Application Name" in "Supported systems" property were added

-Added html obfuscation when possible to avoid AV detection

-All file names are randomized

-Now users can choose between using cab file method or not
This is a critical vulnerability in the MSHTML rendering engine. Microsoft Office applications use the MSHTML engine to process and display web content. An adversary who successfully exploits could achieve full control over a target system by using malicious ActiveX controls to execute arbitrary code.