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CVE-2020-0836

HIGHCVSS 7.5/10EPSS 5.05%

Last modified

CVE-2020-0836 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. <p>A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive.</p> <p>To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service.</p> <p>The update addresses the vulnerability by correcting how Windows DNS processes queries.</p>. EPSS estimates a 5.05% chance of exploitation in the next 30 days.

Description

<p>A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive.</p> <p>To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service.</p> <p>The update addresses the vulnerability by correcting how Windows DNS processes queries.</p>

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
5.05%

91.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersionsUpdate
MicrosoftWindows Server 2008All versionsSp2
MicrosoftWindows Server 2012All versions—
MicrosoftWindows Server 2012r2—
MicrosoftWindows Server 2016All versions—
MicrosoftWindows Server 20161903—
MicrosoftWindows Server 20161909—
MicrosoftWindows Server 20162004—
MicrosoftWindows Server 2019All versions—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-0836?
<p>A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive.</p> <p>To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service.</p> <p>The update addresses the vulnerability by correcting how Windows DNS processes queries.</p>
How severe is CVE-2020-0836?
CVE-2020-0836 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.05% probability of exploitation in the next 30 days.
How do I fix CVE-2020-0836?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-0836?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST