CVE-2021-3859

moderate-risk
Published 2022-08-26

A flaw was found in Undertow that tripped the client-side invocation timeout with certain calls made over HTTP2. This flaw allows an attacker to carry out denial of service attacks.

Do I need to act?

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0.31% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (8)

Affected Vendors

Redhat Netapp

References (12)

Vendor Advisory https://access.redhat.com/security/cve/CVE-2021-3859
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2010378
Patch https://github.com/undertow-io/undertow/commit/e43f0ada3f4da6e8579e0020cec3cb1a8...
Third Party Advisory https://github.com/undertow-io/undertow/pull/1296
Issue Tracking https://issues.redhat.com/browse/UNDERTOW-1979
Third Party Advisory https://security.netapp.com/advisory/ntap-20221201-0004/
Vendor Advisory https://access.redhat.com/security/cve/CVE-2021-3859
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2010378
Patch https://github.com/undertow-io/undertow/commit/e43f0ada3f4da6e8579e0020cec3cb1a8...
Third Party Advisory https://github.com/undertow-io/undertow/pull/1296
Issue Tracking https://issues.redhat.com/browse/UNDERTOW-1979
Third Party Advisory https://security.netapp.com/advisory/ntap-20221201-0004/
41
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 14/34 · Moderate