Tag Archives: HyperV

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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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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July Microsoft Patch Tuesday

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July Microsoft Patch Tuesday

July Microsoft Patch Tuesday. There are 175 vulnerabilities in total, 33 of which appeared between June and July Patch Tuesday.

There are 2 vulnerabilities with the sign of exploitation in the wild:

🔻 Spoofing – Windows MSHTML Platform (CVE-2024-38112). It’s not clear what exactly is being spoofed. Let’s wait for the details. It is currently known that to exploit the vulnerability, an attacker must send the victim a malicious (MSHTML?) file, which the victim must somehow run/open.
🔻 Elevation of Privilege – Windows Hyper-V (CVE-2024-38080). This vulnerability allows an authenticated attacker to execute code with SYSTEM privileges. Again, no details. This could be interpreted that the guest OS user can gain privileges in the host OS (I hope this is not the case).

From the rest we can highlight:

🔸 Elevation of Privilege – various Windows components (CVE-2024-38059, CVE-2024-38066, CVE-2024-38100, CVE-2024-38034, CVE-2024-38079, CVE-2024-38085, CVE-2024-38062, CVE-2024-30079, CVE-2024-38050). EoPs quite often become exploitable.
🔸 Remote Code Execution – Windows Remote Desktop Licensing Service (CVE-2024-38074, CVE-2024-38076, CVE-2024-38077)
🔸 Remote Code Execution – Microsoft Office (CVE-2024-38021)
🔸 Remote Code Execution – Windows Imaging Component (CVE-2024-38060). All you need to do is upload a malicious TIFF file to the server.
🔸 Remote Code Execution – Microsoft SharePoint Server (CVE-2024-38023, CVE-2024-38024). Authentication is required, but “Site Owner” permissions are sufficient.

🗒 Vulristics report on July Microsoft Patch Tuesday

Vulristics shows an exploit existence for Spoofing – RADIUS Protocol (CVE-2024-3596) on GitHub, but in reality it is just a detection utility.

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First impressions of the March Microsoft Patch Tuesday

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First impressions of the March Microsoft Patch Tuesday
First impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch TuesdayFirst impressions of the March Microsoft Patch Tuesday

First impressions of the March Microsoft Patch Tuesday. So far I have not seen anything overtly critical. There are 80 vulnerabilities in total, including 20 added between the February and March MSPT.

With PoC there is only one:

🔻 Information Disclosure – runc (CVE-2024-21626). It allows an attacker to escape from the container. What does Microsoft have to do with it? The vulnerability has been fixed in Azure Kubernetes Service and CBL-Mariner (Microsoft’s internal Linux distribution).

For the rest, there are no signs of active exploitation or the existence of a PoC yet.

We can pay attention to the following:

🔸 Elevation of Privilege – Windows Kernel (CVE-2024-21443, CVE-2024-26173, CVE-2024-26176, CVE-2024-26178, CVE-2024-26182). Such vulnerabilities often become exploitable recently. The same applies to Elevation of Privilege – Windows Print Spooler (CVE-2024-21433).
🔸 Remote Code Execution – Open Management Infrastructure (OMI) (CVE-2024-21334). CVSS 9.8 and ZDI write that “it would allow a remote, unauthenticated attacker to execute code on OMI instances on the Internet”. Perhaps such instances are indeed often accessible via the Internet, this requires research. 🤷‍♂️
🔸 Remote Code Execution – Windows Hyper-V (CVE-2024-21407). This “guest-to-host escape” vulnerability was highlighted by everyone: Qualys, Tenable, Rapid7, ZDI.
🔸 Remote Code Execution – Microsoft Exchange (CVE-2024-26198). This is a “DLL loading” vulnerability. The details are still unclear, but I wouldn’t be surprised if there will be a detailed write-up on it soon.

🗒 Vulristics report

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