The vulnerability has been dubbed PrintNightmare and is tracked as CVE-2021-34527. The flaw is due to the Windows Print Spooler service improperly performing privileged file operations. Microsoft says the flaw can be exploited by an authenticated user calling RpcAddPrinterDriverEx(). When exploited, an attacker gains SYSTEM privileges and can execute arbitrary code, install programs, view, change, or delete data or create new accounts with full user rights.

This update adds the ability to choose an external agent for the smb file share.

It adds more connexion methods and pivoting support.

It adds the ability to login using an identity.

It warns when the target can be patched or not to be vulnerable.
Deserialization vulnerability in Microsoft Exchange MeetingPollProposeOptionsPayload.GetRequests() method. This method can be triggered with an HTTP request and with a specially crafted XML payload it can lead to OS command execution within the context of the w3wp.exe process which has SYSTEM level privileges.



The XML payload is a .NET serialized object which contains the DataContractSerializer formatter and, it may contain the ObjectDataProvider chain from YSoSerial.NET; although other chains can be used. The payload needs to be crafted to be compatible with the way in which Exchange deserializes it.
The Security Service of Cisco AnyConnect Posture (HostScan) for Windows incorrectly restricts access to internal IPC commands. This could enable low-privileged users to achieve NT AUTHORITY\SYSTEM privileges by sending crafted IPC commands.

This module bypasses CVE-2021-1366 by abusing a Time-of-check Time-of-use (TOCTOU) Race Condition in the priv_file_copy command.



This update adds code to launch the exploit for CVE-2021-1366 if the detected version is vulnerable to it.