[CDP-development] TLP:GREEN - (Vulnerability Alert Notification) - Multiple Microsoft Known Exploited Vulnerabilities

[CSS Security Operations Services * DAS]

Good afternoon,

The SOC Services team is reporting on the vulnerability: CVE-2023-36033: Microsoft Windows Desktop Window Manager (DWM) Core Library Privilege Escalation, CVE-2023-36025: Microsoft Windows SmartScreen Security Feature Bypass Vulnerability, and CVE-2023-36036: Microsoft Windows Cloud Files Mini Filter Driver Privilege Escalation Vulnerability. Due to its high visibility and knowledge of the software installed in the state environment, we are providing this in-depth information:

History: On November 14, 2023, CISA added three (CVE-2023-36033, CVE-2023-36025, and CVE-2023-36036) Microsoft vulnerabilities to the Known Exploited Vulnerabilities Catalog. All of the vulnerabilities were fixed in the November 2023 patch Tuesday.

Microsoft has provided the following security advisories:
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-36036
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-36033
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-36025

Intelligence: As of November 14, 2023, the vulnerability has been confirmed as being exploited in the wild.

Workarounds: There are no workarounds at this time.

How it works:

CVE-2023-36036: Microsoft has not released information as to how the vulnerability has been exploited.
CVE-2023-36033: Microsoft has not released information as to how the vulnerability has been exploited.
CVE-2023-36025: Microsoft has provided the following statement, "The user would have to click on a specially crafted Internet Shortcut (.URL) or a hyperlink pointing to an Internet Shortcut file to be compromised by the attacker.".

Post-Exploit:

CVE-2023-36036: Upon successful exploitation of the vulnerability, a threat actor could gain SYSTEM privileges.
CVE-2023-36033: Upon successful exploitation of the vulnerability, a threat actor could gain SYSTEM privileges.
CVE-2023-36025: The attacker would be able to bypass Windows Defender SmartScreen checks and their associated prompts.

As of November 14, 2023, Tenable does not have any plugins for these vulnerabilities and nothing in the plugin pipeline.
Recommended Actions:


  *   Verify host has not been compromised before applying patches.
  *   Apply appropriate updates provided by vendor to vulnerable systems immediately after appropriate testing.
  *   Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  *   Apply the Principle of Least Privilege to all systems and services.


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Cyber Security Services
State of Oregon Cyber Security Services
Enterprise Information Services | SOC
Cyber Security Services (CSS)
SOC Hotline: (503) 378-5930 | SOC Services (503) 373-0378
"Ensuring user-friendly, reliable and secure state technology systems that serve Oregonians."


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