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CVE-2019-19343: A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4

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HIGH 7.5REMOTEWATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2019-19343 is a high-severity flaw (CVSS 7.5) affecting jboss-remoting, jboss enterprise application platform, undertow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4. A memory leak in HttpOpenListener due to holding remote connections indefinitely may lead to denial of service. Versions before undertow 2.0.25.SP1 and jboss-remoting 5.0.14.SP1 are believed to be vulnerable.

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.6% (top 24%)
CISA exploited listNo
WeaknessCWE-400, CWE-404
Published2021-03-23
Last modified2026-06-17
Publisher (CNA): Red Hat, Inc. · Vendor: netapp · redhat

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

redhat jboss-remoting UPGRADE
Affected: < 5.0.14 · 5.0.14
Fixed in: 5.0.14
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy jboss-remoting || rpm -q jboss-remoting || jboss-remoting --version
2. UPGRADE to 5.0.14 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade jboss-remoting
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade jboss-remoting
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
redhat jboss enterprise application platform UPGRADE
Affected: < 7.2.4
Fixed in: 7.2.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy jboss-enterprise-application-platform || rpm -q jboss-enterprise-application-platform || jboss-enterprise-application-platform --version
2. UPGRADE to 7.2.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade jboss-enterprise-application-platform
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade jboss-enterprise-application-platform
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
redhat undertow UPGRADE
Affected: < 2.0.25 · 2.0.25
Fixed in: 2.0.25
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy undertow || rpm -q undertow || undertow --version
2. UPGRADE to 2.0.25 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade undertow
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade undertow
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
netapp active iq unified manager MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy active-iq-unified-manager || rpm -q active-iq-unified-manager || active-iq-unified-manager --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp active iq unified manager MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy active-iq-unified-manager || rpm -q active-iq-unified-manager || active-iq-unified-manager --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp active iq unified manager MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy active-iq-unified-manager || rpm -q active-iq-unified-manager || active-iq-unified-manager --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-19343?

jboss-remoting: upgrade to 5.0.14; jboss enterprise application platform: upgrade to 7.2.4; undertow: upgrade to 2.0.25. Exact commands for each OS are on this page.

Is CVE-2019-19343 being exploited?

CVE-2019-19343 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-19343 affect?

CVE-2019-19343 affects jboss-remoting, jboss enterprise application platform, undertow. Severity is high (CVSS 7.5). A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4. A memory leak in HttpOpenListener due to holding remote connections indefinitely may lead to denial of service. Versions before undertow

How urgent is CVE-2019-19343?

Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

JBoss and WildFly vulnerabilities

Related CVEs

References

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