CVE-2021-31956
published 2021-06-08CVE-2021-31956: Windows NTFS Elevation of Privilege Vulnerability Windows NTFS Elevation of Privilege Vulnerability
high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
KEVITWEXPLOIT
CISA Known Exploited Vulnerabilitydue 2021-11-17
Exploited in the wild
EPSS
20.27%
97.2th percentile
Windows NTFS Elevation of Privilege Vulnerability
Windows NTFS Elevation of Privilege Vulnerability
Affected
37 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_version_1507 | >= 10.0.0 < 10.0.10240.18967 | 10.0.10240.18967 |
| microsoft | windows_10_version_1607 | >= 10.0.0 < 10.0.14393.4467 | 10.0.14393.4467 |
| microsoft | windows_10_version_1809 | >= 10.0.0 < 10.0.17763.1999 | 10.0.17763.1999 |
| microsoft | windows_10_version_1909 | >= 10.0.0 < 10.0.18363.1621 | 10.0.18363.1621 |
| microsoft | windows_10_version_2004 | >= 10.0.0 < 10.0.19041.1052 | 10.0.19041.1052 |
| microsoft | windows_10_version_20h2 | >= 10.0.0 < 10.0.19042.1052 | 10.0.19042.1052 |
| microsoft | windows_10_version_21h1 | >= 10.0.0 < 10.0.19043.1052 | 10.0.19043.1052 |
| microsoft | windows_7 | >= 6.1.0 < 6.1.7601.25632 | 6.1.7601.25632 |
| microsoft | windows_7_service_pack_1 | >= 6.1.0 < 6.1.7601.25632 | 6.1.7601.25632 |
| microsoft | windows_8.1 | >= 6.3.0 < 6.3.9600.20045 | 6.3.9600.20045 |
| microsoft | windows_8.1 | >= 6.3.0 < 6.3.9600.20044 | 6.3.9600.20044 |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.0.0 < 6.1.7601.25632 | 6.1.7601.25632 |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.0 < 6.1.7601.25632 | 6.1.7601.25632 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.0 < 6.0.6003.21137 | 6.0.6003.21137 |
| microsoft | windows_server_2012 | >= 6.2.0 < 6.2.9200.23372 | 6.2.9200.23372 |
| microsoft | windows_server_2012_r2 | >= 6.3.0 < 6.3.9600.20045 | 6.3.9600.20045 |
| microsoft | windows_server_2012_r2 | >= 6.3.0 < 6.3.9600.20044 | 6.3.9600.20044 |
| microsoft | windows_server_2016 | >= 10.0.0 < 10.0.14393.4467 | 10.0.14393.4467 |
| microsoft | windows_server_2019 | >= 10.0.0 < 10.0.17763.1999 | 10.0.17763.1999 |
| microsoft | windows_server_version_2004 | >= 10.0.0 < 10.0.19041.1052 | 10.0.19041.1052 |
| microsoft | windows_server_version_20h2 | >= 10.0.0 < 10.0.19042.1052 | 10.0.19042.1052 |
| msrc | windows_10 | — | — |
| msrc | windows_10_version_1607 | — | — |
| msrc | windows_10_version_1809 | — | — |
| msrc | windows_10_version_1909 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →The exploit chains CVE-2021-31956 with Windows Notification Facility (WNF) to achieve arbitrary kernel memory read/write primitives. Detect unusual WNF state name creation or subscription activity from non-system processes, especially following browser exploitation. ↗
- →The dropper installs WmiPrvMon.exe as a Windows service to act as a launcher for wmimon.dll (remote shell). Hunt for new services registered with names/paths matching WmiPrvMon.exe in the SYSTEM32 directory, especially those loading wmimon.dll. ↗
- →The EoP exploit was targeted specifically at Windows 10 builds 17763, 18362, 18363, 19041, and 19042. Prioritize detection and patching efforts on these build numbers. ↗
- ·CVE-2021-31956 is chained with CVE-2021-31955 (info disclosure in ntoskrnl.exe/SuperFetch) to leak the EPROCESS kernel address before triggering the overflow. Detection of CVE-2021-31956 exploitation in isolation may miss the full chain; monitor for NtQuerySystemInformation calls using SuperfetchPrivSourceQuery class as a precursor. ↗
- ·The Chrome RCE exploit used in the same attack chain (suspected CVE-2021-21224) was not recovered; the full exploit chain cannot be fully replicated or detected end-to-end from available samples. ↗
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C
cvelistv57.8HIGH
vulncheck7.8HIGH
cisa7.8HIGH
vendor_msrc7.8HIGH
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CISA
Microsoft Windows NTFS Privilege Escalation Vulnerability
cisa·2021-11-03·CVSS 7.8
CVE-2021-31956 [HIGH] CWE-191 Microsoft Windows NTFS Privilege Escalation Vulnerability
Vulnerability: Microsoft Windows NTFS Privilege Escalation Vulnerability
Affected: Microsoft Windows
Microsoft Windows New Technology File System (NTFS) contains an unspecified vulnerability that allows attackers to escalate privileges via a specially crafted application.
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-31956
Remediation Due Date: 2021-11-17
Microsoft
Windows NTFS Elevation of Privilege Vulnerability
vendor_msrc·2021-06-08·CVSS 7.8
CVE-2021-31956 [HIGH] Windows NTFS Elevation of Privilege Vulnerability
Windows NTFS Elevation of Privilege Vulnerability
FAQ: How could an attacker exploit this vulnerability?
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
Additionally, an attacker could convince a local user to open a malicious file. The attacker would have to convince the user to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.
Windows NTFS: Windows NTFS
Microsoft: Microsoft
Impact: Elevation of Privilege
Exploit Status: Publicly Disclosed:No;Exploited:Yes;Latest Software Release:Exploitation Detected;Older Software Release:Ex
Project0
The More You Know, The More You Know You Don’t Know - Project Zero
project_zero·2022-04-01
CVE-2016-4654 The More You Know, The More You Know You Don’t Know - Project Zero
A Year in Review of 0-days Used In-the-Wild in 2021
Posted by Maddie Stone, Google Project Zero
This is our third annual year in review of 0-days exploited in-the-wild [2020, 2019]. Each year we’ve looked back at all of the detected and disclosed in-the-wild 0-days as a group and synthesized what we think the trends and takeaways are. The goal of this report is not to detail each individual exploit, but instead to analyze the exploits from the year as a group, looking for trends, gaps, lessons learned, successes, etc. If you’re interested in the analysis of individual exploits, please check out our root cause analysis repository.
We perform and share this analysis in order to make 0-day hard. We want it to be more costly, more resource intensive, and overall more difficult for
CVEList
Windows NTFS Elevation of Privilege Vulnerability
cvelistv5·2021-06-08·CVSS 7.8
CVE-2021-31956 [HIGH] Windows NTFS Elevation of Privilege Vulnerability
Windows NTFS Elevation of Privilege Vulnerability
Windows NTFS Elevation of Privilege Vulnerability
VulnCheck
Microsoft Windows NTFS Privilege Escalation Vulnerability
vulncheck·2021·CVSS 7.8
CVE-2021-31956 [HIGH] CWE-191 Microsoft Windows NTFS Privilege Escalation Vulnerability
Microsoft Windows NTFS Privilege Escalation Vulnerability
Microsoft Windows New Technology File System (NTFS) contains an unspecified vulnerability that allows attackers to escalate privileges via a specially crafted application.
Affected: Microsoft Windows
Required Action: Apply updates per vendor instructions.
Exploitation References: https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit; https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2021-Jun; https://securelist.com/puzzlemaker-chrome-zero-day-exploit-chain/102771/; https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
Exploit PoC: https://vulncheck.com/xdb/736c14a7215d; https://vulncheck.com/xdb/189db9bb950f; https://vulncheck.com/xdb/ef8974070480
Remediation Due: 20
No detection rules found.
No public exploits indexed.
Zscaler
CVE-2022-37969 | Windows CLFS Zero-Day - Zscaler Blog
blogs_zscaler·2022-10-28·CVSS 7.8
[HIGH] CVE-2022-37969 | Windows CLFS Zero-Day - Zscaler Blog
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Securelist
Ten most mysterious APT campaigns that remain unattributed
blogs_securelist·2022-10-07
Ten most mysterious APT campaigns that remain unattributed
Table of Contents
- 1. Project TajMahal
- 2. DarkUniverse
- 3. PuzzleMaker
- 4. ProjectSauron (aka Strider)
- 5. USB Thief
- 6. TENSHO (aka White Tur)
- 7. PlexingEagle
- 8. SinSono
- 9. MagicScroll (aka AcidBox)
- 10. Metador
- Conclusion
Authors
- Costin Raiu
Targeted attack attribution is always a tricky thing, and in general, we believe that attribution is best left to law enforcement agencies. The reason is that, while in 90% of cases it is possible to understand a few things about the attackers, such as their native language or even location, the remaining 10% can lead to embarrassing attribution errors or worse. High-profile actors make every effort to stay undetected inside the victim’s infrastructure and to leave as few traces as they can. They implement a variety of techniqu
Securelist
TOP 10 unattributed APT mysteries
blogs_securelist·2022-10-07
TOP 10 unattributed APT mysteries
Table of Contents
1. Project TajMahal
2. DarkUniverse
3. PuzzleMaker
4. ProjectSauron (aka Strider)
5. USB Thief
6. TENSHO (aka White Tur)
7. PlexingEagle
8. SinSono
9. MagicScroll (aka AcidBox)
10. Metador
Conclusion
Authors
Costin Raiu
Targeted attack attribution is always a tricky thing, and in general, we believe that attribution is best left to law enforcement agencies. The reason is that, while in 90% of cases it is possible to understand a few things about the attackers, such as their native language or even location, the remaining 10% can lead to embarrassing attribution errors or worse. High-profile actors make every effort to stay undetected inside the victim’s infrastructure and to leave as few traces as they can. They implement a variety of techniques to make inve
Qualys
Managing CISA Known Exploited Vulnerabilities with Qualys VMDR | Qualys
blogs_qualys·2022-02-23
Managing CISA Known Exploited Vulnerabilities with Qualys VMDR | Qualys
#### Table of Contents
- Situation
- Directive Scope
- CISA Catalog of Known Exploited Vulnerabilities
- Detect CISA Vulnerabilities Using Qualys VMDR
- CISA Exploited RTI
- Detailed Operational Dashboard
- Remediation
- Federal Enterprises and Agencies Can Act Now
- Summary
- Getting Started
CISA released a directive in November 2021, recommending urgent and prioritized remediation of actively exploited vulnerabilities. Both government agencies and corporations should heed this advice. This blog outlines how Qualys Vulnerability Management, Detection & Response can be used by any organization to respond to this directive efficiently and effectively.
## Situation
Last November 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directiv
Fortinet
The Definition and Examples of Exploit Kits | Fortinet Blog
blogs_fortinet·2022-01-27
The Definition and Examples of Exploit Kits | Fortinet Blog
INDUSTRY TRENDS & INSIGHTS
The Definition and Examples of Exploit Kits
By Aamir Lakhani | January 27, 2022
In cybersecurity terminology, an exploit is a bit of code or a program that takes advantage of vulnerabilities or flaws in software or hardware. An exploit is not malware, but rather a way to deliver malware like ransomware or viruses. The goal of exploits is to install malware or to infiltrate and initiate denial-of-service (DoS) attacks for example.
The recent exponential growth of computer peripherals, software advances, and edge and cloud computing has led to a corresponding increase in vulnerabilities. Of course, cybercriminals love having more systems to attack with exploit kits.
What Is An Exploit Kit?
Exploit kits (EKs) are automated programs used by cybercriminals to ex
Tenable
Microsoft’s December 2021 Patch Tuesday Addresses 67 CVEs (CVE-2021-43890)
blogs_tenable·2021-12-14·CVSS 7.1
[HIGH] Microsoft’s December 2021 Patch Tuesday Addresses 67 CVEs (CVE-2021-43890)
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
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Tenable CIEM Request a demo
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## Vulnerability Exposure
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## AI Exposure
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## OT/IoT Exposure
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## Identity Exposure
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## Business needs
Active Directory
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Azure security
Cloud Security Posture Man
Securelist
APT annual review 2021
blogs_securelist·2021-11-30
APT annual review 2021
Table of Contents
Private sector vendors play a significant role in the threat landscape
Supply-chain attacks
Exploiting vulnerabilities
Firmware vulnerabilities
Authors
GReAT
In the Global Research and Analysis Team at Kaspersky, we track the ongoing activities of more than 900 advanced threat actors and activity clusters; you can find our quarterly overviews here , here and here . For this annual review, we have tried to focus on what we consider to be the most interesting trends and developments of the last 12 months. This is based on our visibility in the threat landscape and it’s important to note that no single vendor has complete visibility into the activities of all threat actors.
## Private sector vendors play a significant role in the threat landscape
Possibly the bigges
Securelist
APT annual review 2021
blogs_securelist·2021-11-30
APT annual review 2021
Table of Contents
- Private sector vendors play a significant role in the threat landscape
- Supply-chain attacks
- Exploiting vulnerabilities
- Firmware vulnerabilities
Authors
- GReAT
In the Global Research and Analysis Team at Kaspersky, we track the ongoing activities of more than 900 advanced threat actors and activity clusters; you can find our quarterly overviews here, here and here. For this annual review, we have tried to focus on what we consider to be the most interesting trends and developments of the last 12 months. This is based on our visibility in the threat landscape and it’s important to note that no single vendor has complete visibility into the activities of all threat actors.
## Private sector vendors play a significant role in the threat landscape
Possibly the
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01
blogs_qualys·2021-11-09
Qualys Response to CISA Alert: Binding Operational Directive 22-01
## Table of Contents
Overview
Directive Scope
CISA Catalog of Known Exploited Vulnerabilities
Detect CISAs Vulnerabilities Using Qualys VMDR
Remediation
Federal Enterprises and Agencies Can Act Now
Summary
Getting Started
Start your VMDR 30-day, no-cost trial today
## Overview
On November 3, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directive 22-01 , “Reducing the Significant Risk of Known Exploited Vulnerabilities.” This directive recommends urgent and prioritized remediation of the vulnerabilities that adversaries are actively exploiting. It establishes a CISA-managed catalog of known exploited vulnerabilities that carry significant risk to the federal government and establishes requirements for agencies to remediate
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01 | Qualys
blogs_qualys·2021-11-09
Qualys Response to CISA Alert: Binding Operational Directive 22-01 | Qualys
#### Table of Contents
- Overview
- Directive Scope
- CISA Catalog of Known Exploited Vulnerabilities
- Detect CISAs Vulnerabilities Using Qualys VMDR
- Remediation
- Federal Enterprises and Agencies Can Act Now
- Summary
- Getting Started
Start your VMDR 30-day, no-cost trial today
## Overview
On November 3, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directive 22-01, “Reducing the Significant Risk of Known Exploited Vulnerabilities.” This directive recommends urgent and prioritized remediation of the vulnerabilities that adversaries are actively exploiting. It establishes a CISA-managed catalog of known exploited vulnerabilities that carry significant risk to the federal government and establishes requirements for agencies to
Securelist
IT threat evolution in Q2 2021. PC statistics
blogs_securelist·2021-08-12
IT threat evolution in Q2 2021. PC statistics
Table of Contents
Quarterly figures
Financial threats
Financial threat statistics
Ransomware programs
Quarterly trends and highlights
Attack on Colonial Pipeline and closure of DarkSide
Closure of Avaddon
Clash with Clop
Attacks on NAS devices
Number of new ransomware modifications
Number of users attacked by ransomware Trojans
Geography of ransomware attacks
Top 10 most common families of ransomware Trojans
Miners
Number of new miner modifications
Number of users attacked by miners
Geography of miner attacks
Vulnerable applications used by cybercriminals during cyberattacks
Attacks on macOS
Geography of threats for macOS
IoT attacks
IoT threat statistics
Attacks via web resources
Countries that serve as sources of web-based attacks: Top 10
Countries where users fa
Securelist
IT threat evolution Q2 2021
blogs_securelist·2021-08-12·CVSS 7.8
[HIGH] IT threat evolution Q2 2021
Table of Contents
- Targeted attacks
- Other malware
Authors
- David Emm
## Targeted attacks
### The leap of a Cycldek-related threat actor
It is quite common for Chinese-speaking threat actors to share tools and methodologies: one such example is the infamous “DLL side-loading triad”: a legitimate executable, a malicious DLL to be side-loaded by it and an encoded payload, generally dropped from a self-extracting archive. This was first thought to be a signature of LuckyMouse, but we have observed other groups using similar “triads”, including HoneyMyte. While it is not possible to attribute attacks based on this technique alone, efficient detection of such triads reveals more and more malicious activity.
We recently described one such file, called “FoundCore”, which caught our atte
Securelist
IT threat evolution in Q2 2021. PC statistics
blogs_securelist·2021-08-12
IT threat evolution in Q2 2021. PC statistics
Table of Contents
- Quarterly figures
- Financial threats
- Ransomware programs
- Miners
- Vulnerable applications used by cybercriminals during cyberattacks
- Attacks on macOS
- IoT attacks
- Attacks via web resources
- Local threats
Authors
- AMR
These statistics are based on detection verdicts of Kaspersky products received from users who consented to providing statistical data.
## Quarterly figures
According to Kaspersky Security Network, in Q2 2021:
- Kaspersky solutions blocked 1,686,025,551 attacks from online resources across the globe.
- Web antivirus recognized 675,832,360 unique URLs as malicious.
- Attempts to run malware for stealing money from online bank accounts were stopped on the computers of 119,252 unique users.
- Ransomware attacks were defeated on the computers
Securelist
APT trends report Q2 2021
blogs_securelist·2021-07-29
APT trends report Q2 2021
Table of Contents
The most remarkable findings
Russian-speaking activity
Chinese-speaking activity
Middle East
Southeast Asia and Korean Peninsula
Other interesting discoveries
Final thoughts
Authors
GReAT
For more than four years, the Global Research and Analysis Team (GReAT) at Kaspersky has been publishing quarterly summaries of advanced persistent threat (APT) activity. The summaries are based on our threat intelligence research and provide a representative snapshot of what we have published and discussed in greater detail in our private APT reports. They are designed to highlight the significant events and findings that we feel people should be aware of.
This is our latest installment, focusing on activities that we observed during Q2 2021.
Readers who would like to learn
Securelist
APT trends report Q2 2021
blogs_securelist·2021-07-29
APT trends report Q2 2021
Table of Contents
- The most remarkable findings
- Russian-speaking activity
- Chinese-speaking activity
- Middle East
- Southeast Asia and Korean Peninsula
- Other interesting discoveries
- Final thoughts
Authors
- GReAT
For more than four years, the Global Research and Analysis Team (GReAT) at Kaspersky has been publishing quarterly summaries of advanced persistent threat (APT) activity. The summaries are based on our threat intelligence research and provide a representative snapshot of what we have published and discussed in greater detail in our private APT reports. They are designed to highlight the significant events and findings that we feel people should be aware of.
This is our latest installment, focusing on activities that we observed during Q2 2021.
Readers who would lik
Checkpoint
14th June – Threat Intelligence Report
blogs_checkpoint·2021-06-14
CVE-2021-21220 14th June – Threat Intelligence Report
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## 14th June – Threat Intelligence Report
For the latest discoveries in cyber research for the week of 14th June, please download our Threat Intelligence Bulletin .
Top Attacks and Breaches
Audi and Volkswagen have experienced data breaches that affected 3.3 million customers. Between August 2019 and May 2021, unsecured data was left exposed on the internet by a mutual vendor. During that time, an unauthorized threat actor accesses the data.
Researchers have observed a new wave of DDoS extortion by Fancy Lazarus,
Krebs
Microsoft Patches Six Zero-Day Security Holes
blogs_krebs·2021-06-08·CVSS 5.2
[MEDIUM] Microsoft Patches Six Zero-Day Security Holes
Microsoft today released another round of security updates for Windows operating systems and supported software, including fixes for six zero-day bugs that malicious hackers already are exploiting in active attacks.
June’s Patch Tuesday addresses just 49 security holes — about half the normal number of vulnerabilities lately. But what this month lacks in volume it makes up for in urgency: Microsoft warns that bad guys are leveraging a half-dozen of those weaknesses to break into computers in targeted attacks.
Among the zero-days are:
–CVE-2021-33742, a remote code execution bug in a Windows HTML component.
–CVE-2021-31955, an information disclosure bug in the Windows Kernel
–CVE-2021-31956, an elevation of privilege flaw in Windows NTFS
–CVE-2021-33739, an elevation of privilege flaw
Qualys
Microsoft & Adobe Patch Tuesday (June 2021) – Microsoft 50 Vulnerabilities with 5 Critical, Adobe 21 Critical Vulnerabilities | Qualys
blogs_qualys·2021-06-08·CVSS 5.2
CVE-2021-31985 [MEDIUM] Microsoft & Adobe Patch Tuesday (June 2021) – Microsoft 50 Vulnerabilities with 5 Critical, Adobe 21 Critical Vulnerabilities | Qualys
### Microsoft Patch Tuesday – June 2021
Microsoft patched 50 CVEs in their June 2021 Patch Tuesday release, and five of them are rated as critical severity. Six have applicable exploits.
#### Critical Microsoft Vulnerabilities Patched
CVE-2021-31985 – Microsoft Defender Remote Code Execution Vulnerability
Microsoft released patches addressing a critical RCE vulnerability in its Defender product (CVE-2021-31985). This CVE has a high likelihood of exploitability and is assigned a CVSSv3 base score of 7.8 by the vendor.
CVE-2021-31959 – Scripting Engine Memory Corruption Vulnerability
Microsoft released patches addressing a critical memory corruption vulnerability in the Chakra JScript scripting engine. This vulnerability impacts Windows RT, Windows 7, Windows 8, Windows 10, Windows Ser
Securelist
PuzzleMaker attacks with Chrome zero-day exploit chain
blogs_securelist·2021-06-08·CVSS 5.5
[MEDIUM] PuzzleMaker attacks with Chrome zero-day exploit chain
Table of Contents
- Remote code execution exploit
- Elevation of privilege exploit
- Malware modules
- IoCs
Authors
- Costin Raiu
- Boris Larin
- Alexey Kulaev
On April 14-15, 2021, Kaspersky technologies detected a wave of highly targeted attacks against multiple companies. Closer analysis revealed that all these attacks exploited a chain of Google Chrome and Microsoft Windows zero-day exploits. While we were not able to retrieve the exploit used for remote code execution (RCE) in the Chrome web browser, we were able to find and analyze an elevation of privilege (EoP) exploit that was used to escape the sandbox and obtain system privileges.
The elevation of privilege exploit was fine-tuned to work against the latest and most prominent builds of Windows 10 (17763 – RS5, 18362 – 19H1,
Securelist
PuzzleMaker attacks with Chrome zero-day exploit chain
blogs_securelist·2021-06-08·CVSS 5.5
[MEDIUM] PuzzleMaker attacks with Chrome zero-day exploit chain
Table of Contents
Remote code execution exploit
Elevation of privilege exploit
Malware modules
IoCs
Authors
Costin Raiu
Boris Larin
Alexey Kulaev
On April 14-15, 2021, Kaspersky technologies detected a wave of highly targeted attacks against multiple companies. Closer analysis revealed that all these attacks exploited a chain of Google Chrome and Microsoft Windows zero-day exploits. While we were not able to retrieve the exploit used for remote code execution (RCE) in the Chrome web browser, we were able to find and analyze an elevation of privilege (EoP) exploit that was used to escape the sandbox and obtain system privileges.
The elevation of privilege exploit was fine-tuned to work against the latest and most prominent builds of Windows 10 (17763 – RS5, 18362 – 19H1, 18363 – 1
Tenable
Microsoft’s June 2021 Patch Tuesday Addresses 49 CVEs (CVE-2021-31955, CVE-2021-31956 and CVE-2021-33742)
blogs_tenable·2021-06-08·CVSS 5.5
[MEDIUM] Microsoft’s June 2021 Patch Tuesday Addresses 49 CVEs (CVE-2021-31955, CVE-2021-31956 and CVE-2021-33742)
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Qualys
Microsoft & Adobe Patch Tuesday (June 2021) – Microsoft 50 Vulnerabilities with 5 Critical, Adobe 21 Critical Vulnerabilities
blogs_qualys·2021-06-08·CVSS 5.2
CVE-2021-31985 [MEDIUM] Microsoft & Adobe Patch Tuesday (June 2021) – Microsoft 50 Vulnerabilities with 5 Critical, Adobe 21 Critical Vulnerabilities
## Microsoft Patch Tuesday – June 2021
Microsoft patched 50 CVEs in their June 2021 Patch Tuesday release, and five of them are rated as critical severity. Six have applicable exploits.
## Critical Microsoft Vulnerabilities Patched
CVE-2021-31985 – Microsoft Defender Remote Code Execution Vulnerability
Microsoft released patches addressing a critical RCE vulnerability in its Defender product (CVE-2021-31985). This CVE has a high likelihood of exploitability and is assigned a CVSSv3 base score of 7.8 by the vendor.
CVE-2021-31959 – Scripting Engine Memory Corruption Vulnerability
Microsoft released patches addressing a critical memory corruption vulnerability in the Chakra JScript scripting engine. This vulnerability impacts Windows RT, Windows 7, Windows 8, Windows 10, Windows Server
Krebs
Microsoft Patches Six Zero-Day Security Holes
blogs_krebs·2021-06-08·CVSS 5.2
[MEDIUM] Microsoft Patches Six Zero-Day Security Holes
Microsoft today released another round of security updates for Windows operating systems and supported software, including fixes for six zero-day bugs that malicious hackers already are exploiting in active attacks.
June’s Patch Tuesday addresses just 49 security holes — about half the normal number of vulnerabilities lately. But what this month lacks in volume it makes up for in urgency: Microsoft warns that bad guys are leveraging a half-dozen of those weaknesses to break into computers in targeted attacks.
Among the zero-days are:
– CVE-2021-33742 , a remote code execution bug in a Windows HTML component.
– CVE-2021-31955 , an information disclosure bug in the Windows Kernel
– CVE-2021-31956 , an elevation of privilege flaw in Windows NTFS
– CVE-2021-33739 , an elevation of privilege
Crowdstrike
Patch Tuesday 2021: A Vulnerability Deep Dive
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] Patch Tuesday 2021: A Vulnerability Deep Dive
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand AT
Crowdstrike
June 2021 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] June 2021 Patch Tuesday: Updates and Analysis
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand AT
Crowdstrike
Patch Tuesday 2021: A Vulnerability Deep Dive
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] Patch Tuesday 2021: A Vulnerability Deep Dive
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand ATT&CK in 10 Minutes or Less [VI
Crowdstrike
June 2021 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] June 2021 Patch Tuesday: Updates and Analysis
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How Charlotte AI AgentWorks Fuels Security's Agentic Ecosystem Mar 25, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand ATT&CK in 10 Minutes or Less [VI
2021-06-08
Published
2021-11-03
Added to CISA KEV
Exploited in the wild