CVE-2023-1108

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 68.7%
KEV: Not listed

Published

September 14, 2023

Last Modified

November 21, 2024

References (36)

secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1184
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1185
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1512
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1513
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1514
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:1516
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:2135
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3883
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3884
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3885
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3888
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3892
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:3954
secalert@redhathttps://access.redhat.com/errata/RHSA-2023:4612
secalert@redhathttps://access.redhat.com/security/cve/CVE-2023-1108

Patch Availability(13)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	eap7-wildfly-elytron-0:1.10.17-1.Final_redhat_00001.1.el7eap	2025-06-25	redhat
redhat	eap7-xml-security-0:2.0.10-2.redhat_00002.1.ep7.el7	2025-04-28	redhat
redhat	undertow	2023-08-16	redhat
redhat	rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el7sso	2023-06-27	redhat
redhat	rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el9sso	2023-06-27	redhat
redhat	rh-sso-7/sso76-openshift-rhel8:7.6-24	2023-06-27	redhat
redhat	rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el8sso	2023-06-27	redhat
redhat	eap7-undertow-jastow-0:2.0.14-1.Final_redhat_00001.1.el8eap	2023-03-29	redhat
redhat	eap7-undertow-jastow-0:2.0.14-1.Final_redhat_00001.1.el7eap	2023-03-29	redhat
redhat	patch	2023-03-29	redhat
redhat	eap7-undertow-jastow-0:2.0.14-1.Final_redhat_00001.1.el9eap	2023-03-29	redhat
redhat	eap7-wildfly-0:7.4.9-6.GA_redhat_00004.1.el7eap	2023-03-09	redhat
redhat	io.undertow/undertow-core:2.2.22.SP3-redhat-00001	2023-03-09	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
io.undertow:undertow-core	1.0.0.Alpha1 ... 2.2.9.Final (292 versions)	2.2.24.Final	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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

All Vendor Advisories

(16)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 17:36 UTCEG score recompute
2026-05-24 17:36 UTCVendor advisory

Frequently asked(5)

What is CVE-2023-1108?

CVE-2023-1108 is a high vulnerability published on September 14, 2023. 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.

When was CVE-2023-1108 disclosed?

CVE-2023-1108 was first published in the National Vulnerability Database on September 14, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-1108 actively exploited?

CVE-2023-1108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 68.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-1108?

CVE-2023-1108 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-1108?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-1108, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-1108

Explore →

Is Your Infrastructure Affected by CVE-2023-1108?

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CVE-2023-1108

Published

Last Modified

References (36)

Patch Availability(13)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-1108?

Same vendor

Same CWE

CVE-2023-1108

📅 Published

🔄 Last Modified

🔗 References (36)

Patch Availability(13)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-1108?

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References (36)

Frequently asked(5)

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