Tag Archives: Microsoft

Progress in exploitation of Remote Code Execution – Windows TCP/IP IPv6 (CVE-2024-38063)

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Progress in exploitation of Remote Code Execution - Windows TCP/IP IPv6 (CVE-2024-38063)

Progress in exploitation of Remote Code Execution – Windows TCP/IP IPv6 (CVE-2024-38063). The vulnerability is from the August Patch Tuesday. 2 weeks ago I already wrote why it is potentially dangerous. Now the danger has increased significantly:

🔻 On August 24, a PoC of the exploit appeared on GitHub. There is a video with the launch of a small python script (39 lines), causing Windows to crash with the error “KERNEL SECURITY CHECK FAILURE”. Looks more like DoS than RCE. But this is only for now.

🔻 Well-known researcher Marcus Hutchins posted a blog post titled “CVE-2024-38063 – Remotely Exploiting The Kernel Via IPv6“. It describes the technical details of exploiting the vulnerability.

The probability that the vulnerability will be exploited in the wild has increased significantly.

❗️ Check if the vulnerability is patched or increase the priority of the fix if it is not yet.

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Remote Code Execution – Scripting Engine (CVE-2024-38178)

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Remote Code Execution - Scripting Engine (CVE-2024-38178)

Remote Code Execution – Scripting Engine (CVE-2024-38178). A vulnerability from the August Microsoft Patch Tuesday. The victim clicks on the attacker’s link, memory corruption occurs and arbitrary attacker’s code is executed.

The tricky part is that the victim has to open the link in Microsoft Edge browser in Internet Explorer compatibility mode. But why would the victim want to set the browser to this mode?

🔻 The victim may be using some old corporate web application that only works in Internet Explorer, so the browser is configured this way. Not such a rare situation. 😏

🔻An attacker may try to convince the victim to enable the setting “Allow sites to be reloaded in Internet Explorer mode (IE mode)” in Edge. 🤷‍♂️

One way or another, the vulnerability is exploited in the wild and there is already a (semi?🤔)public exploit for it. My colleagues at PT ESC shared today how they found and tested this exploit. 🔍

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Trending vulnerabilities of July according to Positive Technologies

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Trending vulnerabilities of July according to Positive Technologies.

The SecLab film crew went on vacation. Therefore, there was a choice: to skip the episode of “In the trend of VM” about the July vulnerabilities, or to make a video myself. Which is what I tried to do. And from the next episode we will return to SecLab again.

📹 Video “In The Trend of VM” on YouTube
🗞 A post on Habr (rus) a slightly expanded script of the video
🗒 A compact digest (rus) on the official PT website

List of vulnerabilities:

🔻 00:33 Spoofing – Windows MSHTML Platform (CVE-2024-38112)
🔻 02:23 RCE – Artifex Ghostscript (CVE-2024-29510)
🔻 03:55 RCE – Acronis Cyber Infrastructure (CVE-2023-45249)

English voice over was generated by my open source utility subtivo (subtitles to voice over)

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Security Feature Bypass – Windows Mark of the Web “Copy2Pwn” (CVE-2024-38213)

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Security Feature Bypass - Windows Mark of the Web Copy2Pwn (CVE-2024-38213)

Security Feature Bypass – Windows Mark of the Web “Copy2Pwn” (CVE-2024-38213). The vulnerability was released as part of the August Microsoft Patch Tuesday (although ZDI writes that MS fixed it earlier, in June).

The vulnerability allows attackers to bypass the SmartScreen security feature, which protects users from running potentially malicious files downloaded from the Internet.

What is it about? There is a set of extensions over HTTP for collaborative work with files – WebDAV.

🔹 The WebDAV share can be accessed via a web browser::

http://10_.37.129.2/example_webdav_folder/somefile

🔹 Or you can do it via Windows Explorer (like SMB):

\\10_.37.129.2@80\example_webdav_folder

When copying from the WebDAV share via Windows Explorer, the Mark-of-the-Web label was not set. 🤷‍♂️ That’s why the name is “Copy2Pwn”. 😏

According to ZDI, the vulnerability has been exploited by the DarkGate malware operator since at least March 2024.

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Remote Code Execution – Windows TCP/IP IPv6 (CVE-2024-38063)

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Remote Code Execution - Windows TCP/IP IPv6 (CVE-2024-38063)

Remote Code Execution – Windows TCP/IP IPv6 (CVE-2024-38063). Vulnerability from August Microsoft Patch Tuesday. No exploits or signs of exploitation in the wild have yet been discovered, but the description of the vulnerability looks scary. 😱

An unauthenticated attacker sends IPv6 packets to a Windows computer and this results in remote code execution. CVSS 9.8, “Exploitation More Likely”.

🔹 If IPv6 is disabled, the vulnerability is not exploited. But by default it is enabled. 😏
🔹 Blocking IPv6 on the local Windows firewall will not prevent exploitation (exploitation occurs before the packet is processed by the firewall). 🤷‍♂️

The vulnerability was found by experts from the Chinese information security company Cyber ​​Kunlun. When technical details and exploits for the vulnerability appear, it may be very critical and “wormable”. 🪱

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Remote Code Execution – Microsoft Project (CVE-2024-38189)

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Remote Code Execution - Microsoft Project (CVE-2024-38189)

Remote Code Execution – Microsoft Project (CVE-2024-38189).

Microsoft Project is a project management program. It is designed to assist a project manager in developing a schedule, assigning resources to tasks, tracking progress, managing the budget, and analyzing workloads.

The vulnerability was fixed as part of the August Patch Tuesday. The malicious code is executed when the victim opens a special Microsoft Office Project file, received in a phishing email or downloaded from the attacker’s website.

👾 For a successful attack, these security features must be disabled:

🔹 Policy “Block macros from running in Office files from the Internet” (enabled by default).
🔹 “VBA Macro Notification Settings“.

Previewing files in the “Preview Pane” is not an exploitation vector. 👍

As you can see, there are quite a few conditions required for a successful attack, but Microsoft has reported cases of exploitation of the vulnerability in the wild. 🤷‍♂️

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August Microsoft Patch Tuesday

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August Microsoft Patch Tuesday

August Microsoft Patch Tuesday. 130 CVEs, of which 45 were added since July MSPT.

In the TOP suddenly is RCE – OpenSSH “regreSSHion” (CVE-2024-6387), which MS fixed in Azure. 🙂

6 vulnerabilities with signs of exploitation in the wild. 😱 It’s been a long time since we’ve seen so many. I will write about them in separate posts.

🔻 EoP – Windows Kernel (CVE-2024-38106), Windows Ancillary Function Driver for WinSock (CVE-2024-38193), Windows Power Dependency Coordinator (CVE-2024-38107)
🔻 Security Feature Bypass – Windows Mark of the Web (CVE-2024-38213)
🔻 RCE – Microsoft Project (CVE-2024-38189)
🔻 RCE – Scripting Engine (CVE-2024-38178)

Other:

🔸 AuthBypass – Windows Update Stack (CVE-2024-38202) – the vulnerability was recently presented at BlackHat
🔹 Interesting RCEs – Windows TCP/IP (CVE-2024-38063) and LPD (CVE-2024-38199)
🔹 A lot of EoPs in Windows components (~26)

🗒 Full Vulristics report

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