Immediately Patch Windows 0-Day Flaw That's Being Used to Spread Spyware

Windows 0-Day Flaw Get ready to install a fairly large batch of security patches onto your Windows computers.

As part of its September Patch Tuesday, Microsoft has released a large batch of security updates to patch a total of 81 CVE-listed vulnerabilities, on all supported versions of Windows and other MS products.

The latest security update addresses 27 critical and 54 important vulnerabilities in severity, of which 38 vulnerabilities are impacting Windows, 39 could lead to Remote Code Execution (RCE).

Affected Microsoft products include:

Internet Explorer
Microsoft Edge
Microsoft Windows
.NET Framework
Skype for Business and Lync
Microsoft Exchange Server
Microsoft Office, Services and Web Apps
Adobe Flash Player

NET 0-Day Flaw Under Active Attack
According to the company, four of the patched vulnerabilities are publicly known, one of which has already been actively exploited by the attackers in the wild.

Here’s the list of publically known flaws and their impact:

Windows .NET Framework RCE (CVE-2017-8759)—A zero-day flaw, discovered by researchers at cybersecurity firm FireEye and privately reported it to Microsoft, resides in the way Microsoft .NET Framework processes untrusted input data.
Microsoft says the flaw could allow an attacker to take control of an affected system, install programs, view, change, or delete data by tricking victims into opening a specially crafted document or application sent over an email.
The flaw could even allow an attacker to create new accounts with full user rights. Therefore users with fewer user rights on the system are less impacted than users who operate with admin rights.
According to FireEye, this zero-day flaw has actively been exploited by a well-funded cyber espionage group to deliver FinFisher Spyware (FinSpy) to a Russian-speaking “entity” via malicious Microsoft Office RTF files in July this year.
FinSpy is a highly secret surveillance software that has previously been associated with British company Gamma Group, a company that legally sells surveillance and espionage software to government agencies.
Once infected, FinSpy can perform a large number of secret tasks on victims computer, including secretly monitoring computers by turning ON webcams, recording everything the user types with a keylogger, intercepting Skype calls, copying files, and much more.