CVE-2024-3884: Undertow: outofmemory when parsing form data encoding with application/x-www-form-urlencoded

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-03 · updated 2026-10-14
Weakness: CWE-20

Description

A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.

Affected products

Red Hat JBoss Enterprise Application Platform 7: all versions
Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7: all versions — fixed in 0:1.4.18-19.SP17_redhat_00001.1.ep7.el7, 0:7.1.14-4.GA_redhat_00003.1.ep7.el7
Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7: all versions — fixed in 0:2.0.41-7.SP8_redhat_00001.1.el7eap, 0:7.3.17-5.GA_redhat_00006.1.el7eap
Red Hat JBoss Enterprise Application Platform 7.4.24: all versions — fixed in 2.2.39.Final-redhat-00001
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7: all versions — fixed in 0:2.2.39-1.Final_redhat_00001.1.el7eap, 0:7.4.24-4.GA_redhat_00002.1.el7eap
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8: all versions — fixed in 0:2.2.39-1.Final_redhat_00001.1.el8eap, 0:7.4.24-4.GA_redhat_00002.1.el8eap
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9: all versions — fixed in 0:2.2.39-1.Final_redhat_00001.1.el9eap, 0:7.4.24-4.GA_redhat_00002.1.el9eap
Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8: all versions — fixed in 0:1.0.0-3.redhat_00009.1.el8eap, 0:1.83.0-1.redhat_00001.1.el8eap, 0:2.0.2-1.Final_redhat_00001.1.el8eap, 0:2.3.23-1.SP3_redhat_00001.1.el8eap, 0:33.0.0-2.jre_redhat_00003.1.el8eap, 0:4.0.6-1.redhat_00001.1.el8eap
Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9: all versions — fixed in 0:1.0.0-3.redhat_00009.1.el9eap, 0:1.83.0-1.redhat_00001.1.el9eap, 0:2.0.2-1.Final_redhat_00001.1.el9eap, 0:2.3.23-1.SP3_redhat_00001.1.el9eap, 0:33.0.0-2.jre_redhat_00003.1.el9eap, 0:4.0.6-1.redhat_00001.1.el9eap
Red Hat JBoss Enterprise Application Platform 8.1.3: all versions — fixed in 2.3.20.SP4-redhat-00001
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8: all versions — fixed in 0:1.0.1-3.redhat_00003.1.el8eap, 0:1.82.0-1.redhat_00001.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el8eap, 0:2.5.0-1.redhat_00001.1.el8eap, 0:2.6.6-1.Final_redhat_00001.1.el8eap, 0:4.0.10-1.redhat_00001.1.el8eap
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9: all versions — fixed in 0:1.0.1-3.redhat_00003.1.el9eap, 0:1.82.0-1.redhat_00001.1.el9eap, 0:2.3.20-2.SP4_redhat_00001.1.el9eap, 0:2.5.0-1.redhat_00001.1.el9eap, 0:2.6.6-1.Final_redhat_00001.1.el9eap, 0:4.0.10-1.redhat_00001.1.el9eap

How to fix

Upgrade to a fixed version: Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.4.18-19.SP17_redhat_00001.1.ep7.el7, 0:7.1.14-4.GA_redhat_00003.1.ep7.el7; Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.0.41-7.SP8_redhat_00001.1.el7eap, 0:7.3.17-5.GA_redhat_00006.1.el7eap; Red Hat JBoss Enterprise Application Platform 7.4.24 2.2.39.Final-redhat-00001; Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 0:2.2.39-1.Final_redhat_00001.1.el7eap, 0:7.4.24-4.GA_redhat_00002.1.el7eap; Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8 0:2.2.39-1.Final_redhat_00001.1.el8eap, 0:7.4.24-4.GA_redhat_00002.1.el8eap; Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9 0:2.2.39-1.Final_redhat_00001.1.el9eap, 0:7.4.24-4.GA_redhat_00002.1.el9eap; Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 0:1.0.0-3.redhat_00009.1.el8eap, 0:1.83.0-1.redhat_00001.1.el8eap, 0:2.0.2-1.Final_redhat_00001.1.el8eap, 0:2.3.23-1.SP3_redhat_00001.1.el8eap; Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 0:1.0.0-3.redhat_00009.1.el9eap, 0:1.83.0-1.redhat_00001.1.el9eap, 0:2.0.2-1.Final_redhat_00001.1.el9eap, 0:2.3.23-1.SP3_redhat_00001.1.el9eap; Red Hat JBoss Enterprise Application Platform 8.1.3 2.3.20.SP4-redhat-00001; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 0:1.0.1-3.redhat_00003.1.el8eap, 0:1.82.0-1.redhat_00001.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el8eap, 0:2.5.0-1.redhat_00001.1.el8eap; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 0:1.0.1-3.redhat_00003.1.el9eap, 0:1.82.0-1.redhat_00001.1.el9eap, 0:2.3.20-2.SP4_redhat_00001.1.el9eap, 0:2.5.0-1.redhat_00001.1.el9eap. Check the vendor advisory for mitigations.

References

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