CVE-2023-21557: Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
First published: Tue Jan 10 2023(Updated: )
Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows 7 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Windows 11 | =22H2 | |
| Windows 11 | =22H2 | |
| Windows 11 | =21H2 | |
| Windows 11 | =21H2 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Windows 11 | ||
| Windows 11 | ||
| Windows 11 | ||
| Windows 11 | ||
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows | ||
| Microsoft Windows | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2022 | ||
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =1607 | |
| Windows 10 | =1607 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | ||
| Windows 10 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-21557?
CVE-2023-21557 is classified as a denial of service vulnerability.
How do I fix CVE-2023-21557?
You can fix CVE-2023-21557 by installing the appropriate Microsoft security updates released for affected products.
Which systems are affected by CVE-2023-21557?
CVE-2023-21557 affects various versions of Microsoft Windows 10, Windows 11, and Windows Server editions.
Is there a patch available for CVE-2023-21557?
Yes, Microsoft has issued several patches that address CVE-2023-21557 for the affected Windows versions.
What are the possible exploitation outcomes of CVE-2023-21557?
Successful exploitation of CVE-2023-21557 can lead to denial of service, rendering the system unresponsive.
- agent/type
- agent/first-publish-date
- agent/title
- agent/severity
- agent/references
- agent/description
- collector/msrc-cve
- source/Microsoft
- agent/software-canonical-lookup
- agent/weakness
- agent/author
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- collector/nvd-index
- agent/softwarecombine
- agent/tags
- vendor/microsoft
- canonical/microsoft windows 7
- canonical/microsoft windows 10
- canonical/microsoft windows server 2012 r2
- canonical/microsoft windows server 2008 r2
- canonical/microsoft windows rt
- canonical/microsoft windows server
- canonical/microsoft windows 8.1
- canonical/microsoft windows server 2019
- canonical/windows 11
- version/windows 11/22h2
- version/windows 11/21h2
- canonical/microsoft windows server 2022
- canonical/microsoft windows server 2016
- version/microsoft windows 7/sp1
- canonical/microsoft windows
- version/microsoft windows server/sp2
- version/microsoft windows server/r2-sp1
- version/microsoft windows server/r2
- canonical/windows 10
- version/windows 10/20h2
- version/windows 10/1809
- version/windows 10/22h2
- version/windows 10/1607
- version/windows 10/21h2