CVE-2021-3859: Undertow vulnerable to Denial of Service (DoS) attacks

CVE-2021-3859 · Severity: low · CVSS 3.1 · Published 2022-07-15

Undertow vulnerable to Denial of Service (DoS) attacks

Technologies: io.undertow:undertow-core (Maven). Vendors: Maven.

Quick answers

Is CVE-2021-3859 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-3859 being exploited in the wild.
How severe is CVE-2021-3859?
Low severity, with a CVSS score of 3.1, published 15 July 2022.
Which products and versions are affected?
io.undertow:undertow-core (Maven) ECOSYSTEM:introduced=0,fixed=2.2.15.
Is there a fix for CVE-2021-3859?
Yes. io.undertow:undertow-core (Maven): upgrade to 2.2.15 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-3859?
Check whether you run io.undertow:undertow-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • io.undertow:undertow-core (Maven): upgrade to 2.2.15 or later
    # set io.undertow:undertow-core to 2.2.15 in your pom.xml or build.gradle

Affected products

  • io.undertow:undertow-core (Maven) ECOSYSTEM:introduced=0,fixed=2.2.15

Identifiers

  • CVE-2021-3859
  • GHSA-339q-62wm-c39w

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