What is CVE-2021-3859?

CVE-2021-3859 is a vulnerability in Undertow, classified under CWE-214. Published 2022-08-26.

Is CVE-2021-3859 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Undertow

CVE-2021-3859

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.

EPSS: 0.003 (55.2th percentile) — read the EPSS interpretation.

Affected products

N/a Undertow — versions Fixed in 2.2.15.Final

Weakness classification (CWE)

CWE-214

Public proof-of-concept exploits

ARPSyndicate/cvemon
muneebaashiq/MBProjects

References

bugzilla.redhat.com/show_bug.cgi
issues.redhat.com/browse/UNDERTOW-1979
github.com/undertow-io/undertow/pull/1296
github.com/undertow-io/undertow/commit/e43f0ada3f4da6e8579e0020cec3cb1a81e487c2
access.redhat.com/security/cve/CVE-2021-3859
security.netapp.com/advisory/ntap-20221201-0004/

Frequently asked questions

What is CVE-2021-3859?: CVE-2021-3859 is a vulnerability in Undertow, classified under CWE-214. Published 2022-08-26.
Is CVE-2021-3859 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.