CVE-2021-43238: Microsoft Windows Remote Access Connection Manager Service Link Following Denial-of-Service Vulnerability
First published: Tue Dec 14 2021(Updated: )
This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the Remote Access Connection Manager service. By creating a directory junction, an attacker can abuse the service to create a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows 10 | =20H2 | |
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =21h1 | |
| Microsoft Windows 10 | =21h1 | |
| Microsoft Windows 10 | =21h1 | |
| Microsoft Windows 10 | =21h2 | |
| Microsoft Windows 10 | =21h2 | |
| Microsoft Windows 10 | =21h2 | |
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 11 | ||
| Microsoft Windows 11 | ||
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 8.1 | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows RT 8.1 | ||
| Microsoft Windows Server | =20h2 | |
| Microsoft Windows Server | =2022 | |
| Microsoft Windows Server 2008 | =sp2 | |
| Microsoft Windows Server 2008 | =r2-sp1 | |
| Microsoft Windows Server 2012 | ||
| Microsoft Windows Server 2012 | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows | ||
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows 10 | =21H1 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows 10 | =20H2 | |
| Microsoft Windows 8.1 for x64-based systems | ||
| Microsoft Windows RT 8.1 | ||
| Microsoft Windows Server 2012 | ||
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows Server 2012 | ||
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows 11 | =21H2 | |
| Microsoft Windows 10 | =20H2 | |
| Microsoft Windows 10 | ||
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows 10 | =21H1 | |
| Microsoft Windows 8.1 for 32-bit systems | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2008 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows 11 | =21H2 | |
| Microsoft Windows 10 | =21H2 | |
| Microsoft Windows Server | =2004 | |
| Microsoft Windows 10 | =21H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows 10 | =21H2 | |
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | =21H1 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows Server 2008 | ||
| Microsoft Windows Server 2008 | ||
| Microsoft Windows Server 2008 | ||
| =20h2 | ||
| =20h2 | ||
| =20h2 | ||
| =21h1 | ||
| =21h1 | ||
| =21h1 | ||
| =21h2 | ||
| =21h2 | ||
| =21h2 | ||
| =1607 | ||
| =1607 | ||
| =1809 | ||
| =1809 | ||
| =1809 | ||
| =1909 | ||
| =1909 | ||
| =1909 | ||
| =2004 | ||
| =2004 | ||
| =2004 | ||
| =sp1 | ||
| =sp1 | ||
| =20h2 | ||
| =2022 | ||
| =sp2 | ||
| =r2-sp1 | ||
| =r2 | ||
| =2004 | ||
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Reference Links
- collector/msrc-cve
- agent/type
- agent/first-publish-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/remedy
- agent/title
- agent/references
- agent/severity
- agent/weakness
- agent/description
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-22-019
- alias/ZDI-CAN-14955
- alias/CVE-2021-43238
- agent/software-canonical-lookup
- source/Microsoft
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/last-modified-date
- agent/author
- agent/tags
- agent/softwarecombine
- agent/event
- agent/trending
- vendor/microsoft
- canonical/microsoft windows 10
- version/microsoft windows 10/20h2
- version/microsoft windows 10/21h1
- version/microsoft windows 10/21h2
- version/microsoft windows 10/1607
- version/microsoft windows 10/1809
- version/microsoft windows 10/1909
- version/microsoft windows 10/2004
- canonical/microsoft windows 11
- canonical/microsoft windows 7
- version/microsoft windows 7/sp1
- canonical/microsoft windows 8.1
- canonical/microsoft windows rt 8.1
- canonical/microsoft windows server
- version/microsoft windows server/20h2
- version/microsoft windows server/2022
- canonical/microsoft windows server 2008
- version/microsoft windows server 2008/sp2
- version/microsoft windows server 2008/r2-sp1
- canonical/microsoft windows server 2012
- version/microsoft windows server 2012/r2
- canonical/microsoft windows server 2016
- version/microsoft windows server 2016/2004
- canonical/microsoft windows server 2019
- canonical/microsoft windows
- canonical/microsoft windows server 2022
- canonical/microsoft windows server 2012 r2
- canonical/microsoft windows 8.1 for x64-based systems
- canonical/microsoft windows server 2008 r2
- version/microsoft windows 11/21h2
- canonical/microsoft windows 8.1 for 32-bit systems
- version/microsoft windows server/2004