Tag Archives: Windows

About Spoofing – Windows NTLM (CVE-2025-24054) vulnerability

Leave a reply

About Spoofing - Windows NTLM (CVE-2025-24054) vulnerability

About Spoofing – Windows NTLM (CVE-2025-24054) vulnerability. It was patched in the March Microsoft Patch Tuesday. VM vendors didn’t mention this vulnerability in their reviews; it was only known to be exploited via user interaction with a malicious file.

A month later, on April 16, Check Point published a blog post with technical details, revealing that the vulnerability is exploited using specially crafted files…

✋ Wait a minute — there was a trending vulnerability in March MSPT: CVE-2025-24071, related to the same files. 🤔 Turns out, it’s THE SAME vulnerability. 🤪 Check Point reports: “Microsoft had initially assigned the vulnerability the CVE identifier CVE-2025-24071, but it has since been updated to CVE-2025-24054“. What a mess. 🤷‍♂️ Technical details in the previous post.

👾 Since March 19, Check Point has tracked about 11 campaigns exploiting this vulnerability to collect NTLMv2-SSP hashes.

На русском

About Elevation of Privilege – Windows Process Activation (CVE-2025-21204) vulnerability

Leave a reply

About Elevation of Privilege - Windows Process Activation (CVE-2025-21204) vulnerability

About Elevation of Privilege – Windows Process Activation (CVE-2025-21204) vulnerability. This vulnerability from the April Microsoft Patch Tuesday was not highlighted by VM vendors in their reviews. It affects the Windows Update Stack component and is related to improper link resolution before file access (CWE-59).

🔻 On April 14, researcher Elli Shlomo (CYBERDOM) published a write-up and exploit code to gain SYSTEM privileges. On April 27, after reports that the exploit didn’t work, he removed it and promised to revise it. 🤔 Exploitability remains unclear.

🔻 On April 22, researcher Kevin Beaumont reported that the fix for this vulnerability, involving the creation of the folder, introduces a new denial-of-service vulnerability. It allows non-admin users to block the installation of Windows security updates. Microsoft responded that they don’t plan to fix it promptly. 🤷‍♂️ For now, it’s recommended to monitor for malicious activity.

На русском

April “In the Trend of VM” (#14): vulnerabilities in Microsoft Windows, VMware products, Kubernetes, and Apache Tomcat

Leave a reply

April In the Trend of VM (#14): vulnerabilities in Microsoft Windows, VMware products, Kubernetes, and Apache Tomcat

April “In the Trend of VM” (#14): vulnerabilities in Microsoft Windows, VMware products, Kubernetes, and Apache Tomcat. We decided to pause recording new videos, so for now only text. 🤷‍♂️🙂

🗞 Post on Habr (rus)
🗒 Digest on the PT website (rus)

A total of 11 trending vulnerabilities:

🔻 Elevation of Privilege – Windows Cloud Files Mini Filter Driver (CVE-2024-30085)
🔻 Spoofing – Windows File Explorer (CVE-2025-24071)
🔻 Four Windows vulnerabilities from March Microsoft Patch Tuesday were exploited in the wild (CVE-2025-24985, CVE-2025-24993, CVE-2025-26633, CVE-2025-24983)
🔻 Three VMware “ESXicape” Vulnerabilities (CVE-2025-22224, CVE-2025-22225, CVE-2025-22226)
🔻 Remote Code Execution – Apache Tomcat (CVE-2025-24813)
🔻 Remote Code Execution – Kubernetes (CVE-2025-1974)

На русском

March episode “In the Trend of VM” (#13): vulnerabilities of Microsoft, PAN-OS, СommuniGate and who should patch hosts with deployed application

Leave a reply

March episode “In the Trend of VM” (#13): vulnerabilities of Microsoft, PAN-OS, СommuniGate and who should patch hosts with deployed application. I’m posting the translated video with a big delay, but it’s better than never. 😉

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

Content:

🔻 00:00 Greetings
🔻 00:31 Elevation of Privilege – Windows Ancillary Function Driver for WinSock (CVE-2025-21418)
🔻 01:12 Elevation of Privilege – Windows Storage (CVE-2025-21391)
🔻 01:53 Authentication Bypass – PAN-OS (CVE-2025-0108)
🔻 03:09 Remote Code Execution – CommuniGate Pro (BDU:2025-01331)
🔻 04:27 The VM riddle: who should patch hosts with a deployed application?
🔻 07:11 About the digest of trending vulnerabilities

На русском

April Microsoft Patch Tuesday

Leave a reply

April Microsoft Patch Tuesday

April Microsoft Patch Tuesday. A total of 153 vulnerabilities, 2 times more than in March. Of these, 32 were added between the March and April MSPTs. Three vulnerabilities show signs of exploitation in the wild:

🔻 EoP – Windows Common Log File System Driver (CVE-2025-29824). An attacker can gain SYSTEM privileges. No technical details yet.
🔻 SFB – Microsoft Edge (CVE-2025-2783). Sandbox escape with an existing PoC exploit.
🔻 RCE – Microsoft Edge (CVE-2025-24201). Originally reported as a WebKit vuln on Apple OSes. 🤷‍♂️

Microsoft also patched vulnerabilities in Kubernetes with known exploits (CVE-2025-1974, CVE-2025-1097, CVE-2025-1098, CVE-2025-24514, CVE-2025-24513)

Other notable ones:

🔹 RCE – LDAP (CVE-2025-26670, CVE-2025-26663), TCP/IP (CVE-2025-26686), Microsoft Office (CVE-2025-29794, CVE-2025-29793), RDS (CVE-2025-27480, CVE-2025-27482), Hyper-V (CVE-2025-27491)
🔹 SFB – Kerberos (CVE-2025-29809)

🗒 Full Vulristics report

На русском

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

Leave a reply

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.

На русском

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

Leave a reply

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. 😱

На русском