This security advisory describes one medium risk vulnerability.
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a boundary error when Microsoft IIS Server fails to check the length of a buffer prior to copying memory to it. A remote authenticated user can use a specially crafted application to trigger memory corruption and execute arbitrary code in the context of NT AUTHORITY\system escaping the Sandbox.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.Mitigation
Install update from vendor's website.Vulnerable software versions
Windows: 7, 8.1, 10 1607, 10 1803, 10 1809, 10 1903, RT 8.1
Windows Server: 1803, 1903, 2008, 2008 R2, 2012, 2012 R2, 2016, 2019
Microsoft IIS: 7.5, 8.0, 8.5, 10.0CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.