Tag Archives: Windows

About Elevation of Privilege – Windows Cloud Files Mini Filter Driver (CVE-2024-30085) vulnerability

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About Elevation of Privilege - Windows Cloud Files Mini Filter Driver (CVE-2024-30085) vulnerability

About Elevation of Privilege – Windows Cloud Files Mini Filter Driver (CVE-2024-30085) vulnerability. cldflt.sys is a Windows Cloud Files Mini Filter driver responsible for representing cloud-stored files and folders as if they were located on the local machine. The vulnerability in this driver, fixed as part of the June 2024 Microsoft Patch Tuesday, allows an attacker to gain SYSTEM privileges. The root cause of the vulnerability is a Heap-based Buffer Overflow (CWE-122).

🔻 A private exploit was presented at the TyphoonPWN 2024 competition on May 30, 2024. It was used as part of an exploit chain to achieve a VMware Workstation Guest-to-Host escape.

🔻 On December 19, 2024, a technical write-up and exploit code were published on the SSD Secure Disclosure website.

🔻 On March 3, a blog post by Positive Technologies was published that examines the roots of the vulnerability and exploitation techniques.

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About Spoofing – Windows File Explorer (CVE-2025-24071) vulnerability

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About Spoofing - Windows File Explorer (CVE-2025-24071) vulnerability

About Spoofing – Windows File Explorer (CVE-2025-24071) vulnerability. The vulnerability is from the March Microsoft Patch Tuesday. The VM vendors didn’t highlight it in their reviews. A week later, on March 18, researcher 0x6rss published a write-up and a PoC exploit. According to him, the vulnerability is exploited in the wild, and the exploit has likely been available for purchase since November 2024.

The point is this. When Windows File Explorer detects a .library-ms file in a folder, it automatically starts parsing it. If the file contains a link to a remote SMB share, an NTLM authentication handshake begins. An attacker controlling the SMB share can intercept the NTLMv2 hash, crack it, or use it in pass-the-hash attacks.

But how does an attacker deliver such a file to the victim? It turns out that just extracting a ZIP/RAR archive with the file is enough to trigger the exploit. No need to open the file.

This is super effective for phishing. 😱

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March Microsoft Patch Tuesday

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March Microsoft Patch Tuesday

March Microsoft Patch Tuesday. 77 CVEs, 20 of which were added during the month. 7 vulnerabilities with signs of exploitation in the wild:

🔻 RCE – Windows Fast FAT File System Driver (CVE-2025-24985)
🔻 RCE – Windows NTFS (CVE-2025-24993)
🔻 SFB – Microsoft Management Console (CVE-2025-26633)
🔻 EoP – Windows Win32 Kernel Subsystem (CVE-2025-24983)
🔻 InfDisc – Windows NTFS (CVE-2025-24991, CVE-2025-24984)
🔻 AuthBypass – Power Pages (CVE-2025-24989) – in Microsoft web service, can be ignored

There are no vulnerabilities with public exploits, there are 2 more with private ones:

🔸 RCE – Bing (CVE-2025-21355) – in Microsoft web service, can be ignored
🔸 SFB – Windows Kernel (CVE-2025-21247)

Among the others:

🔹 RCE – Windows Remote Desktop Client (CVE-2025-26645) and Services (CVE-2025-24035, CVE-2025-24045), MS Office (CVE-2025-26630), WSL2 (CVE-2025-24084)
🔹 EoP – Windows Win32 Kernel Subsystem (CVE-2025-24044)

🗒 Full Vulristics report

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New episode “In the Trend of VM” (#12): 8 February CVEs & Why the Darknet Matters for VM Specialists

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New episode “In the Trend of VM” (#12): 8 February CVEs & Why the Darknet Matters for VM Specialists. Now with a new design and new video editing. 😉

📹 Video on YouTube and LinkedIn
🗞 Post on Habr (rus)
🗒 Digest on the PT website

Content:

🔻 00:00 Greetings
🔻 00:23 Remote Code Execution – Windows Lightweight Directory Access Protocol (LDAP) (CVE-2024-49112)
🔻 01:35 Remote Code Execution – Microsoft Configuration Manager (CVE-2024-43468)
🔻 02:38 Remote Code Execution – Windows OLE (CVE-2025-21298)
🔻 03:55 Elevation of Privilege – Windows Hyper-V NT Kernel Integration VSP (CVE-2025-21333, CVE-2025-21334, CVE-2025-21335)
🔻 05:02 Authentication Bypass – FortiOS/FortiProxy (CVE-2024-55591)
🔻 06:16 Remote Code Execution – 7-Zip (CVE-2025-0411)
🔻 07:27 Should a VM specialist be aware of what is happening in the Darknet?
🔻 08:48 About the digest of trending vulnerabilities

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New episode “In The Trend of VM” (#11): vulnerabilities that became trending in December and the final report on trending vulnerabilities for 2024

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New episode “In The Trend of VM” (#11): vulnerabilities that became trending in December and the final report on trending vulnerabilities for 2024. I made this episode exclusively for the Telegram channel @avleonovcom “Vulnerability Management and More”. 😉

📹 Video on YouTube, LinkedIn
🗞 Post on Habr (rus)
🗒 Digest on the PT website

Content:

🔻 00:00 Greetings
🔻 00:28 Elevation of Privilege – Windows Kernel Streaming WOW Thunk Service Driver (CVE-2024-38144)
🔻 01:30 Elevation of Privilege – Windows Common Log File System Driver (CVE-2024-49138)
🔻 02:37 Remote Code Execution – Apache Struts (CVE-2024-53677)
🔻 03:31 Authentication Bypass – Hunk Companion WordPress plugin (CVE-2024-11972)
🔻 04:44 Trending vulnerabilities for 2024

👾 08:10 Channel mascot 😅

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February Microsoft Patch Tuesday

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February Microsoft Patch Tuesday

February Microsoft Patch Tuesday. 89 CVEs, 33 added since January. Two with signs of exploitation in the wild:

🔻 EoP – Windows Ancillary Function Driver for WinSock (CVE-2025-21418)
🔻 EoP – Windows Storage (CVE-2025-21391)

There are no vulnerabilities with public exploits, but there are 7 with private ones:

🔸 RCE – Microsoft Edge (CVE-2025-21279, CVE-2025-21283)
🔸 Auth. Bypass – Azure (CVE-2025-21415)
🔸 EoP – Windows Setup Files Cleanup (CVE-2025-21419)
🔸 Spoofing – Windows NTLM (CVE-2025-21377)
🔸 Spoofing – Microsoft Edge (CVE-2025-21267, CVE-2025-21253)

Among the rest, the following can be highlighted:

🔹 RCE – Windows LDAP (CVE-2025-21376), Microsoft Excel (CVE-2025-21381, CVE-2025-21387), Microsoft SharePoint Server (CVE-2025-21400), DHCP Client Service (CVE-2025-21379)
🔹 EoP – Windows Core Messaging (CVE-2025-21184, CVE-2025-21358, CVE-2025-21414), Windows Installer (CVE-2025-21373)

🗒 Full Vulristics report

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About Elevation of Privilege – Windows Hyper-V NT Kernel Integration VSP (CVE-2025-21333, CVE-2025-21334, CVE-2025-21335) vulnerability

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About Elevation of Privilege - Windows Hyper-V NT Kernel Integration VSP (CVE-2025-21333, CVE-2025-21334, CVE-2025-21335) vulnerability

About Elevation of Privilege – Windows Hyper-V NT Kernel Integration VSP (CVE-2025-21333, CVE-2025-21334, CVE-2025-21335) vulnerability. These three vulnerabilities were disclosed as part of Microsoft’s January Patch Tuesday and share the same description. They were found in a component used for communications between the host OS and container-type virtual machines, such as Windows Sandbox and Microsoft Defender Application Guard (MDAG).

If the vulnerabilities are successfully exploited, an attacker can gain System privileges. Microsoft specifically notes that this is a local privilege escalation on the host system, not any type of guest to host escape.

👾 These vulnerabilities are being actively exploited in the wild, though no public exploits are currently available.

The only difference in the vulnerability descriptions is that CVE-2025-21333 is caused by Heap-based Buffer Overflow, while CVE-2025-21334 and CVE-2025-21335 are caused by Use After Free.

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