Tag Archives: DNS

Microsoft Patch Tuesday April 2023: CLFS EoP, Word RCE, MSMQ QueueJumper RCE, PCL6, DNS, DHCP

Hello everyone! This episode will be about Microsoft Patch Tuesday for April 2023, including vulnerabilities that were added between March and April Patch Tuesdays.

Alternative video link (for Russia): https://vk.com/video-149273431_456239123

As usual, I use my open source Vulristics project to analyse and prioritize vulnerabilities. I took the comments about the vulnerabilities from the Qualys, Tenable, Rapid7, ZDI Patch Tuesday reviews. And this is the first Patch Tuesday report since I added EPSS support to Vulristics. 😉

Compared to March, Microsoft Patch Tuesday for April 2023 is kind of weak. 🙄

Continue reading

Microsoft Patch Tuesday September 2022: CLFS Driver EoP, IP packet causes RCE, Windows DNS Server DoS, Spectre-BHB

Hello everyone! Let’s take a look at Microsoft’s September Patch Tuesday. This time it is quite compact. There were 63 CVEs released on Patch Tuesday day. If we add the vulnerabilities released between August and September Patch Tuesdays (as usual, they were in Microsoft Edge), the final number is 90. Much less than usual.

Alternative video link (for Russia): https://vk.com/video-149273431_456239101

Continue reading

Microsoft Patch Tuesday April 2022 and custom CVE comments sources in Vulristics

Hello everyone! This episode will be about Microsoft Patch Tuesday for April 2022 and new improvements in my Vulristics project. I decided to add more comment sources. Because it’s not just Tenable, Qualys, Rapid7 and ZDI make Microsoft Patch Tuesday reviews, but also other security companies and bloggers.

Alternative video link (for Russia): https://vk.com/video-149273431_456239085

You can see them in my automated security news telegram channel avleonovnews after every second Tuesday of the month. So, now you can add any links with CVE comments to Vulristics.

Continue reading

Microsoft Patch Tuesday February 2022

Hello everyone! This episode will be about Microsoft Patch Tuesday for February 2022. I release it pretty late, because of the my previous big episode about the blindspots in the Knowledge Bases of Vulnerability Scanners. Please take a look if you haven’t seen it. Well, if you are even slightly interested in the world news, you can imagine that the end of February 2022 in Eastern Europe is not the best time to create new content on Vulnerability Management. Let’s hope that peace and tranquility will be restored soon. And also that geopolitical confrontation between the largest nuclear powers will de-escalate somehow.

But let’s get back to information security. While working on Microsoft Patch Tuesday report for February 2022, I made a lot of improvements to my open source project for vulnerability prioritization Vulristics. I want to start with them.

Continue reading

Security News: Microsoft Patch Tuesday October 2021, Autodiscover, MysterySnail, Exchange, DNS, Apache, HAProxy, VMware vCenter, Moodle

Hello everyone! This episode will be about relatively recent critical vulnerabilities. Let’s start with Microsoft Patch Tuesday for October 2021. Specifically, with the vulnerability that I expected there, but it didn’t get there.

Autodiscover leak discovered by Guardicore Labs

“Autodiscover, a protocol used by Microsoft Exchange for automatic configuration of clients such as Microsoft Outlook, has a design flaw that causes the protocol to “leak” web requests to Autodiscover domains outside of the user’s domain but in the same TLD (i.e. Autodiscover.com).” Guardicore Labs acquired multiple Autodiscover domains and have captured 372,072 Windows domain credentials in total. It seems Microsoft have chosen to ignore this issue. No CVE, no Outlook or ActiveSync patches. The only fix is to ban the “Autodiscover.” domains on devices.

Microsoft Patch Tuesday for October 2021

74 vulnerabilities: 1 Critical, 30 High, 43 Medium.

Elevation of Privilege – Windows Kernel (CVE-2021-40449)

It is a use-after-free vulnerability in the NtGdiResetDC function of the Win32k driver. A detailed technical description is available in Kasperky Securelist post, but, in short, the vulnerability can lead to leakage of kernel module addresses in the computer’s memory. This vulnerability is being exploited in the wild by APT MysterySnail. All servers and desktops should be updated.

Continue reading

Vulristics Microsoft Patch Tuesday July 2021: Zero-days EoP in Kernel and RCE in Scripting Engine, RCEs in Kernel, DNS Server, Exchange and Hyper-V

Hello everyone! For the past 9 months, I’ve been doing Microsoft Patch Tuesday reviews quarterly. Now I think it would be better to review the July Patch Tuesday while the topic is still fresh. And that will save us some time in the next Last Week’s Security news episode. So, July Patch Tuesday, 116 vulnerabilities.

The 2 most critical are the Windows Kernel Elevation of Privilege Vulnerabilities (CVE-2021-31979, CVE-2021-33771). These vulnerabilities are critical because they are used in real attacks according to Microsoft’s Threat Intelligence Center and Security Response Center. Tenable: “A local, authenticated attacker could exploit these vulnerabilities to run processes with elevated permissions. Similar zero-day vulnerabilities were patched in April 2020, which were observed under active exploitation by Google Project Zero.”

Continue reading

Vulristics: Microsoft Patch Tuesdays Q1 2021

Hello everyone! It has been 3 months since my last review of Microsoft vulnerabilities for Q4 2020. In this episode I want to review the Microsoft vulnerabilities for the first quarter of 2021. There will be 4 parts: January, February, March and the vulnerabilities that were released between the Patch Tuesdays.

I will be using the reports that I created with my Vulristics tool. This time I’ll try to make the episodes shorter. I will describe only the most critical vulnerabilities. Links to the full reports are at the bottom of the blog post.

Continue reading