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NVD / CVE Program· CNA redhat

CVE-2023-1108: Undertow: infinite loop in sslconduit during close

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.7% (FIRST EPSS); higher than 77.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: undertow (Debian:14) 2.3.8-2; io.undertow:undertow-core (Maven) 2.3.5.Final, 2.2.24.Final; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_eus:7.1::el7) 0:1.5.5.016-1.redhat_00001.1.ep7.el7.

Low priority for now. Upgrade to undertow (Debian:14) 2.3.8-2; io.undertow:undertow-core (Maven) 2.3.5.Final, 2.2.24.Final; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_eus:7.1::el7) 0:1.5.5.016-1.redhat_00001.1.ep7.el7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Sep 14, 2023
Updated
Jun 17, 2026
EPSS
1.7% · 77th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · redhat
7.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-1108

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatbuild of quarkus
redhatdecision manager
redhatfuse
redhatintegration camel k
redhatintegration service registry
redhatjboss enterprise application platform
redhatjboss enterprise application platform expansion pack
redhatopenshift application runtimes
redhatopenstack platform
redhatprocess automation
redhatsingle sign-on
redhatundertow

and 5 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netapp oncommand workflow automationall versions
  • redhat build of quarkusall versions
  • redhat decision manager7.0
  • redhat fuse1.0.0
  • redhat integration camel kall versions
  • redhat integration service registryall versions
  • redhat jboss enterprise application platformall versions
  • redhat jboss enterprise application platform7.4
  • redhat jboss enterprise application platform expansion packall versions
  • redhat openshift application runtimesall versions
  • redhat openshift container platform4.11
  • redhat openshift container platform4.12
  • redhat openshift container platform for linuxone4.10
  • redhat openshift container platform for linuxone4.9
  • redhat openshift container platform for power4.10
  • redhat openshift container platform for power4.9
  • redhat openstack platform13.0
  • redhat process automation7.0
  • redhat single sign-onall versions
  • redhat single sign-on7.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • github.com/undertow-io/undertow io.undertow:undertow-core

    • 2.3.5, 2.2.24not affected

  • Red Hat EAP 7.4.10 release

    • all versionsunknown

  • Red Hat Red Hat build of Quarkus

    • all versionsunknown

  • Red Hat Red Hat Data Grid 8

    • all versionsunknown

  • Red Hat Red Hat Fuse 7.12

    • all versionsunknown

  • Red Hat Red Hat Integration Camel K

    • all versionsaffected

  • Red Hat Red Hat Integration Camel Quarkus

    • all versionsunknown

  • Red Hat Red Hat Integration Service Registry

    • all versionsaffected

  • Red Hat Red Hat JBoss Data Grid 7

    • all versionsunknown

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.1.0

    • all versionsunknown

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8

    • 0:2.2.22-1.SP3_redhat_00002.1.el8eap and laternot affected · rpm
    • 0:7.4.9-6.GA_redhat_00004.1.el8eap and laternot affected · rpm
    • 0:2.2.23-1.SP2_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.0.14-1.Final_redhat_00001.1.el8eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9

    • 0:2.2.22-1.SP3_redhat_00002.1.el9eap and laternot affected · rpm
    • 0:7.4.9-6.GA_redhat_00004.1.el9eap and laternot affected · rpm
    • 0:2.2.23-1.SP2_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.0.14-1.Final_redhat_00001.1.el9eap and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14undertowbefore 2.3.8-22.3.8-2
Mavenio.undertow:undertow-corefrom 2.3.0 · before 2.3.5.Final2.3.5.Final
Mavenio.undertow:undertow-corebefore 2.2.24.Final2.2.24.Final
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemisbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-clibefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-commonsbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-core-clientbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-dtobefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-hornetq-protocolbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-hqclient-protocolbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-jdbc-storebefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-jms-clientbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-jms-serverbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-journalbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-nativebefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-rabefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-selectorbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-serverbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-activemq-artemis-service-extensionsbefore 0:1.5.5.016-1.redhat_00001.1.ep7.el70:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-artemis-nativebefore 1:1.5.5.016-1.redhat_00001.1.ep7.el71:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-artemis-native-debuginfobefore 1:1.5.5.016-1.redhat_00001.1.ep7.el71:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-artemis-native-wildflybefore 1:1.5.5.016-1.redhat_00001.1.ep7.el71:1.5.5.016-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-jboss-xnio-basebefore 0:3.5.11-1.Final_redhat_00001.1.ep7.el70:3.5.11-1.Final_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-jsoupbefore 0:1.14.2-1.redhat_00002.1.ep7.el70:1.14.2-1.redhat_00002.1.ep7.el7

+96

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-2974Quarkus-core: tls protocol configured with quarkus.http.ssl.protocols is not enforced, client can enforce weaker supported tls protocol
    32Monitor
  • CVE-2022-4492The undertow client is not checking the server identity presented by the server certificate in https connections.
    30Monitor
  • CVE-2022-1259A flaw was found in Undertow.
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-3914Aug 25, 2022 · It was found that the smallrye health metrics UI component did not properly sanitize some user inputs.
    24Monitor
  • ← EarlierCVE-2023-1664May 26, 2023 · A flaw was found in Keycloak.
    26Monitor
  • Later →CVE-2023-6393Dec 6, 2023 · Quarkus: potential invalid reuse of context when @cacheresult on a uni is used
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:undertow2.3.8-2 · Debian:14Package registry (OSV)
Maven:io.undertow:undertow-core2.2.24.FinalPackage registry (OSV)
Maven:io.undertow:undertow-core2.3.5.FinalPackage registry (OSV)
red hat:eap7-activemq-artemis-native1:1.0.2-3.redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-apache-mime4j0:0.8.9-1.redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-artemis-native1:1.0.2-4.redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-artemis-native-debuginfo1:1.0.2-4.redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-snakeyaml0:1.33.0-2.SP1_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-undertow0:2.2.22-1.SP3_redhat_00002.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-undertow-jastow0:2.0.14-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly0:7.4.9-6.GA_redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk110:7.4.9-6.GA_redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk80:7.4.9-6.GA_redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-javadocs0:7.4.9-6.GA_redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-modules0:7.4.9-6.GA_redhat_00004.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (17 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records