Tag Archives: DNS

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.

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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.

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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.

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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.”

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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.

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Microsoft Patch Tuesday September 2020: Zerologon and other exploits, RCEs in SharePoint and Exchange

I would like to start this post by talking about Microsoft vulnerabilities, which recently turned out to be much more serious than it seemed at first glance.

Older Vulnerabilities with exploits

“Zerologon” Netlogon RCE (CVE-2020-1472)

One of them is, of course, the Netlogon vulnerability from the August 2020 Patch Tuesday. It’s called “Zerologon”. I would not say that Vulnerability Management vendors completely ignored it. But none of them (well, maybe only ZDI) emphasized in their reports that this vulnerability would be a real disaster.

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Barapass, Tsunami scanner, vulnerabilities in Windows DNS Server and SAP products, weird attack on Twitter

This episode is based on posts from my Telegram channel avleonovcom, published in the last 2 weeks. So, if you use Telegram, please subscribe. I update it frequently.

Barapass, Tsunami scanner, vulnerabilities in Windows DNS Server and SAP products, weird attack on Twitter

Barapass update

I recently released an update to my password manager barapass. BTW, it seems to be my only pet project at the MVP stage, which I use every day. ?

What’s new:

  1. Now I am sure that it works on Windows 10 without WSL. And you can run it beautifully even with the icon. ? Read more about installation in Windows in this file.
  2. Not only “copy the next value to the clipboard” (or “revolver mode” ) is now possible in the search results section. You can also get the previous value or copy the same value one again if it was somehow erased in the clipboard. Previously, I had to retype the search request each time to do this, and it was quite annoying. By the way, I unexpectedly discovered that the user input history inside the application magically works in the Windows shell (using up and down arrows) without any additional coding. On Linux it does not.
  3. You can set a startup command, for example, to decrypt the container.
  4. The startup command and quick (favorite) commands are now in settings.json and not hard-coded.
  5. settings.json, container files and decrypted files are now in “files” directory. It became more convenient to update barapass, just change the scripts in the root directory and that’s it. I divided the scripts into several files, now it should be more clear how it works.

So, if you need a minimalistic console password manager in which you can easily use any encryption you like – welcome! You can read more about barapass in my previous post.

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