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Fencer Vulns
high 7.5

CVE-2023-1108 json

Undertow: infinite loop in sslconduit during close

published 2023-09-14 3 y ago modified 2026-07-08 4 mo ago also GHSA-m4mm-pg93-fv78 , EUVD-2023-2542

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

A flaw was found in undertow. This issue makes achieving a denial of service possible due to an unexpected handshake status updated in SslConduit, where the loop never terminates.

Patch / fix

  • maven io.undertow:undertow-core 2.2.24.Final, 2.3.5.Final
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 0:2.0.14-1.Final_redhat_00001.1.el8eap, 0:2.2.22-1.SP3_redhat_00002.1.el8eap, 0:2.2.23-1.SP2_redhat_00001.1.el8eap, 0:7.4.9-6.GA_redhat_00004.1.el8eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 0:2.0.14-1.Final_redhat_00001.1.el9eap, 0:2.2.22-1.SP3_redhat_00002.1.el9eap, 0:2.2.23-1.SP2_redhat_00001.1.el9eap, 0:7.4.9-6.GA_redhat_00004.1.el9eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 0:2.0.14-1.Final_redhat_00001.1.el7eap, 0:2.2.22-1.SP3_redhat_00002.1.el7eap, 0:2.2.23-1.SP2_redhat_00001.1.el7eap, 0:7.4.9-6.GA_redhat_00004.1.el7eap
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.8-1.redhat_00001.1.el7sso
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.8-1.redhat_00001.1.el8sso
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.8-1.redhat_00001.1.el9sso
  • Red Hat RHEL-8 based Middleware Containers 7.6-24
  • undertow Debian 14 2.3.8-2

debian advisories DEBIAN-CVE-2023-1108

  • eap7-netty jboss enterprise application platform 7.4 4.1.86-1.Final_redhat_00001.1.el9eap
  • eap7-wildfly jboss enterprise application platform 7.4 7.4.10-6.GA_redhat_00002.1.el9eap
  • eap7-resteasy jboss enterprise application platform 7.4 3.15.5-1.Final_redhat_00001.1.el9eap
  • eap7-undertow jboss enterprise application platform 7.4 2.2.23-1.SP2_redhat_00001.1.el9eap
  • eap7-snakeyaml jboss enterprise application platform 7.4 1.33.0-2.SP1_redhat_00001.1.el9eap
  • eap7-infinispan jboss enterprise application platform 7.4 11.0.17-1.Final_redhat_00001.1.el9eap
  • eap7-ironjacamar jboss enterprise application platform 7.4 1.5.11-1.Final_redhat_00001.1.el9eap
  • eap7-jbossws-cxf jboss enterprise application platform 7.4 5.4.8-1.Final_redhat_00001.1.el9eap

red hat advisories RHSA-2025:9583RHSA-2025:4226RHSA-2023:1514RHSA-2023:1513RHSA-2023:1512RHSA-2023:3885

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-1108 updated cvss 7.5

Undertow: Infinite loop in SslConduit during close

  • Red Hat build of Apicurio Registry 2 undertow undertow Red Hat Integration Camel K 1 undertow undertow
    affected: no fix available
  • Red Hat JBoss Data Grid 7 undertow undertow
    affected: no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack undertow undertow
    affected: no fix available
  • Red Hat JBoss Fuse 6 undertow undertow
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 13 (Queens) undertow
    affected: no fix available
  • Red Hat Middleware Containers for OpenShift rh-sso-7/sso76-openshift-rhel8 7.6-24
    fixed: vendor fix RHSA-2023:3888
  • Red Hat Fuse 7.12
    fixed: vendor fix RHSA-2023:3954
  • Red Hat JBoss EAP 7.4 for RHEL 7 Server eap7-wildfly 7.4.9-6.GA_redhat_00004.1.el7eap, eap7-undertow 2.2.22-1.SP3_redhat_00002.1.el7eap, eap7-undertow 2.2.23-1.SP2_redhat_00001.1.el7eap, eap7-wildfly-modules 7.4.9-6.GA_redhat_00004.1.el7eap, eap7-wildfly-javadocs 7.4.9-6.GA_redhat_00004.1.el7eap, eap7-wildfly-java-jdk8 7.4.9-6.GA_redhat_00004.1.el7eap, +2 more Red Hat JBoss EAP 7.4 for RHEL 8 eap7-wildfly 7.4.9-6.GA_redhat_00004.1.el8eap, eap7-undertow 2.2.22-1.SP3_redhat_00002.1.el8eap, eap7-undertow 2.2.23-1.SP2_redhat_00001.1.el8eap, eap7-wildfly-modules 7.4.9-6.GA_redhat_00004.1.el8eap, eap7-wildfly-javadocs 7.4.9-6.GA_redhat_00004.1.el8eap, eap7-undertow-jastow 2.0.14-1.Final_redhat_00001.1.el8eap Red Hat JBoss EAP 7.4 for RHEL 9 eap7-wildfly 7.4.9-6.GA_redhat_00004.1.el9eap, eap7-undertow 2.2.22-1.SP3_redhat_00002.1.el9eap, eap7-undertow 2.2.23-1.SP2_redhat_00001.1.el9eap, eap7-wildfly-modules 7.4.9-6.GA_redhat_00004.1.el9eap, eap7-wildfly-javadocs 7.4.9-6.GA_redhat_00004.1.el9eap, eap7-undertow-jastow 2.0.14-1.Final_redhat_00001.1.el9eap
    fixed: vendor fix RHSA-2023:1185
show 11 more
  • Red Hat JBoss Enterprise Application Platform undertow-core 2.2.23.SP2-redhat-00001
    fixed: vendor fix RHSA-2023:1516
  • Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 Server eap7-jsoup 1.14.2-1.redhat_00002.1.ep7.el7, eap7-wildfly 7.1.10-2.GA_redhat_00002.1.ep7.el7, eap7-woodstox-core 5.0.3-2.redhat_00002.1.ep7.el7, eap7-xml-security 2.0.10-2.redhat_00002.1.ep7.el7, eap7-undertow 1.4.18-14.SP13_redhat_00001.1.ep7.el7, eap7-artemis-native 1.5.5.016-1.redhat_00001.1.ep7.el7, +19 more
    fixed: vendor fix RHSA-2025:4226
  • Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 Server eap7-wildfly 7.3.14-3.GA_redhat_00002.1.el7eap, eap7-netty 4.1.63-5.Final_redhat_00003.1.el7eap, eap7-jackson-core 2.10.4-3.redhat_00006.1.el7eap, eap7-undertow 2.0.41-4.SP5_redhat_00001.1.el7eap, eap7-netty-all 4.1.63-5.Final_redhat_00003.1.el7eap, eap7-jackson-databind 2.10.4-5.redhat_00006.1.el7eap, +37 more
    fixed: vendor fix RHSA-2025:9583
  • Red Hat JBoss Enterprise Application Platform 7.4.9 undertow-core 2.2.22.SP3-redhat-00001
    fixed: vendor fix RHSA-2023:1184
  • Red Hat Single Sign-On 7
    fixed: vendor fix RHSA-2023:3892
  • Red Hat Single Sign-On 7.6 for RHEL 7 Server rh-sso7-keycloak 18.0.8-1.redhat_00001.1.el7sso, rh-sso7-keycloak-server 18.0.8-1.redhat_00001.1.el7sso
    fixed: vendor fix RHSA-2023:3883
  • Red Hat Single Sign-On 7.6 for RHEL 8 rh-sso7-keycloak 18.0.8-1.redhat_00001.1.el8sso, rh-sso7-keycloak-server 18.0.8-1.redhat_00001.1.el8sso
    fixed: vendor fix RHSA-2023:3884
  • Red Hat Single Sign-On 7.6 for RHEL 9 rh-sso7-keycloak 18.0.8-1.redhat_00001.1.el9sso, rh-sso7-keycloak-server 18.0.8-1.redhat_00001.1.el9sso
    fixed: vendor fix RHSA-2023:3885
  • Red Hat support for Spring Boot 2.7.13
    fixed: vendor fix RHSA-2023:4612
  • Red Hat RHPAM 7.13.1 async
    fixed: vendor fix RHSA-2023:2135
  • Red Hat build of Quarkus quarkus-undertow Red Hat Data Grid 8 undertow undertow Red Hat Integration Camel Quarkus 1 undertow undertow Red Hat JBoss EAP 7.4 for RHEL 7 Server eap7-wildfly 7.4.10-6.GA_redhat_00002.1.el7eap, eap7-netty 4.1.86-1.Final_redhat_00001.1.el7eap, eap7-apache-mime4j 0.8.9-1.redhat_00001.1.el7eap, eap7-artemis-native 1.0.2-4.redhat_00004.1.el7eap, eap7-snakeyaml 1.33.0-2.SP1_redhat_00001.1.el7eap, eap7-resteasy 3.15.5-1.Final_redhat_00001.1.el7eap, +98 more Red Hat JBoss EAP 7.4 for RHEL 8 eap7-wildfly 7.4.10-6.GA_redhat_00002.1.el8eap, eap7-netty 4.1.86-1.Final_redhat_00001.1.el8eap, eap7-apache-mime4j 0.8.9-1.redhat_00001.1.el8eap, eap7-artemis-native 1.0.2-4.redhat_00004.1.el8eap, eap7-snakeyaml 1.33.0-2.SP1_redhat_00001.1.el8eap, eap7-resteasy 3.15.5-1.Final_redhat_00001.1.el8eap, +99 more Red Hat JBoss EAP 7.4 for RHEL 9 eap7-wildfly 7.4.10-6.GA_redhat_00002.1.el9eap, eap7-netty 4.1.86-1.Final_redhat_00001.1.el9eap, eap7-apache-mime4j 0.8.9-1.redhat_00001.1.el9eap, eap7-artemis-native 1.0.2-4.redhat_00004.1.el9eap, eap7-snakeyaml 1.33.0-2.SP1_redhat_00001.1.el9eap, eap7-resteasy 3.15.5-1.Final_redhat_00001.1.el9eap, +98 more
    +2 more products
    Red Hat JBoss Enterprise Application Platform pom.xml, c3 0.6.0, c3 0.7.1, d3 5.9.2, fs 2.1.2, ip 2.0.0, +1541 more Red Hat JBoss Enterprise Application Platform 7.4.9 pom.xml, c3 0.6.0, c3 0.7.1, d3 5.9.2, fs 2.1.2, ip 2.0.0, +1536 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven io.undertow:undertow-core
>=2.3.0, <2.3.5.Final
<2.2.24.Final
2.3.5.Final
2.2.24.Final

Affected products

  • Red Hat EAP 7.4.10 release
  • Red Hat Red Hat Fuse 7.12
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.1.0
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7
  • Red Hat Red Hat Single Sign-On 7
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
  • Red Hat Red Hat support for Spring Boot 2.7.13
  • Red Hat RHEL-8 based Middleware Containers
  • Red Hat RHPAM 7.13.1 async
  • Red Hat Red Hat build of Quarkus
  • Red Hat Red Hat Data Grid 8
  • Red Hat Red Hat Integration Camel K
  • Red Hat Red Hat Integration Camel Quarkus
  • Red Hat Red Hat Integration Service Registry
  • Red Hat Red Hat JBoss Data Grid 7
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat JBoss Fuse 6
  • Red Hat Red Hat OpenStack Platform 13 (Queens)

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.