Tag Archives: Windows

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

Leave a reply

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”. 🪱

На русском

August Microsoft Patch Tuesday

Leave a reply

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

На русском

Remote Code Execution – Windows Remote Desktop Licensing Service “MadLicense” (CVE-2024-38077)

Leave a reply

Remote Code Execution - Windows Remote Desktop Licensing Service MadLicense (CVE-2024-38077)

Remote Code Execution – Windows Remote Desktop Licensing Service “MadLicense” (CVE-2024-38077). The vulnerability was fixed in July Patch Tuesday. An unauthenticated attacker can get RCE by sending messages to RDL. CVSS 9.8. Updates for Win Server from 2008 to 2022.

What is the RDL service? By default, Remote Desktop Services allow only two simultaneous RDP connections to a Windows server. If you need more, you need to purchase additional licenses. These licenses are managed by the RDL service. Often, admins enable RDL on Win servers where it is not needed. 🙄🤷‍♂️

On August 9, a write-up and PoC for Server 2025 were posted on GitHub. So far, it’s only Python pseudo-code without critical parts.

They write that 170,000 hosts with RDL are accessible from the Internet. 🤷‍♂️ And there should be countless of them on intranets.

❗️ Looks like a long-running trending vulnerability story.

Researchers promise us BadLicense and DeadLicense as well. 😉

На русском

No Boot – No Hacker!

Leave a reply

No Boot – No Hacker! Updated track. It seems that the case with the CrowdStrike BSODStrike incident is coming to a logical conclusion. Why this happened is already more or less clear. All that remains is long legal battles between clients and the vendor. Therefore, I am closing this topic for myself with an updated track made in Suno. It’s in Russian, but subtitles are available on YouTube.

My position is that BSODStrike was not the problems of a specific company, but rather the problems of cloud CyberSecurity services with agents, whose architecture is vulnerable. Such services literally force customers to overtrust them. 🤷‍♂️ I don’t think it’s right to keep silent about this. We need to call for improving the security, transparency and controllability of such services.

It should be understood that this was just a small and relatively harmless failure, but someday we will see a case with a full-scale attack through a hacked cloud vendor. And, as it seems to me, at the moment, on-premise solutions have their advantages.

На русском

Trending vulnerabilities for June according to Positive Technologies

Leave a reply

Trending vulnerabilities for June according to Positive Technologies. Traditionally, in 3 formats (in Russian):

📹 The section “Trending VM” in the SecLab news video (starts at 15:03)
🗞 Post on the Habr website, in fact this is a slightly expanded scenario for the “Trending VM” section
🗒 Compact digest with technical details on the official PT website

List of vulnerabilities:

🔻 EoP in Microsoft Windows CSC (CVE-2024-26229)
🔻 EoP in Microsoft Windows Error Reporting (CVE-2024-26169)
🔻 EoP in Microsoft Windows Kernel (CVE-2024-30088)
🔻 RCE in PHP (CVE-2024-4577)
🔻 EoP in Linux Kernel (CVE-2024-1086)
🔻 InfDisclosure in Check Point Security Gateways (CVE-2024-24919)
🔻 RCE in VMware vCenter (CVE-2024-37079, CVE-2024-37080)
🔻 AuthBypass in Veeam Backup & Replication (CVE-2024-29849)

На русском

The severity of the Elevation of Privilege – Windows Kernel (CVE-2024-30088) has increased

Leave a reply

The severity of the Elevation of Privilege - Windows Kernel (CVE-2024-30088) has increased

The severity of the Elevation of Privilege – Windows Kernel (CVE-2024-30088) has increased. The vulnerability is fresh, it is from the June Microsoft Patch Tuesday. I highlighted it in the review because, according to the CVSS vector, there was a private Proof-of-Concept Exploit for it. But there were no details. It was only clear that in case of successful exploitation, the attacker gains SYSTEM privileges. According to the ZDI advisory, the vulnerability affects the implementation of NtQueryInformationToken and is due to the lack of proper locking when performing operations on the object.

On June 24, 2 weeks after the June Patch Tuesday, a repository with technical details on this vulnerability and PoC appeared on GitHub. A video of running the utility to obtain SYSTEM privileges is also available.

A lot of exploits have begun to appear for Windows EoP/LPE vulnerabilities recently. Fix them in advance!

На русском

The criticality of the Elevation of Privilege – Windows Error Reporting Service (CVE-2024-26169) vulnerability has increased

Leave a reply

The criticality of the Elevation of Privilege - Windows Error Reporting Service (CVE-2024-26169) vulnerability has increased

The criticality of the Elevation of Privilege – Windows Error Reporting Service (CVE-2024-26169) vulnerability has increased. If exploited successfully, the attacker gains SYSTEM privileges. The vulnerability was fixed in Microsoft’s March Patch Tuesday. As often happens, no one highlighted this vulnerability back then. 🤷‍♂️

However, 3 months later, on June 12, Symantec researchers reported attacks related to the famous Black Basta ransomware, in which exploits for this vulnerability were used. If we believe the compilation timestamps, these exploits were created long before the release of Microsoft’s patches, in February 2024 or even December 2023. Of course, attackers could fake them, but why would they do that? 🤔

On June 13, the vulnerability was added to CISA KEV. The exploit is not yet publicly available.

The moral is the same: vulnerability prioritization is good, but regular unconditional patching is better.

На русском