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CVE-2021-3597

MEDIUMCVSS 5.9/10EPSS 1.06%

Last modified

CVE-2021-3597 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.

Metrics

CVSS 3.1
5.9/10

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

EPSS Probability
1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RedhatFuse1.0
RedhatJboss Enterprise Application PlatformAll versions
RedhatOpenshift Application RuntimesAll versions
RedhatSingle Sign-OnAll versions
RedhatUndertow< 2.0.35
RedhatUndertow>= 2.2.0, < 2.2.6
RedhatUndertow2.0.35
RedhatUndertow2.0.36
RedhatUndertow2.0.39
RedhatUndertow2.2.6
RedhatUndertow2.2.7
RedhatUndertow2.2.9
RedhatJboss Enterprise Application Platform7.3
RedhatJboss Enterprise Application Platform7.4
NetappActive Iq Unified ManagerAll versions
NetappOncommand InsightAll versions
NetappOncommand Workflow AutomationAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-3597?
A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.
How severe is CVE-2021-3597?
CVE-2021-3597 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3597?
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-2021-3597?

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

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Source: NVD / NIST