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

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.

Published: 2023-09-14 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-1108 is rated Moderate Risk (53.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.57%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-1108

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-10 0.55% 0.57% +0.02%
2 2026-01-13 2.56% 0.55% -2.02%
3 2026-01-04 — 2.56% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-1108

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-1108

GitHub Security Advisory for CVE-2023-1108

GHSA-m4mm-pg93-fv78 · Severity: high · Ecosystem: maven — Undertow denial of service vulnerability

OS Trackers for CVE-2023-1108

vendor priority summary link
debian not yet assigned CVE-2023-1108 not yet assigned priority: Debian including 1 source packages (undertow), 2 status rows across 2 suites (forky, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2023-1108
redhat high — https://access.redhat.com/security/cve/CVE-2023-1108
ubuntu medium CVE-2023-1108 medium priority: Ubuntu including 1 source packages (undertow), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 4, DNE 2. https://ubuntu.com/security/CVE-2023-1108

Affected software / configurations for CVE-2023-1108

Vendor Product Version Raw CPE
redhat build_of_quarkus — cpe:2.3:a:redhat:build_of_quarkus:-:*:*:*:*:*:*:*
redhat decision_manager 7.0 cpe:2.3:a:redhat:decision_manager:7.0:*:*:*:*:*:*:*
redhat fuse 1.0.0 cpe:2.3:a:redhat:fuse:1.0.0:*:*:*:*:*:*:*
redhat integration_camel_k — cpe:2.3:a:redhat:integration_camel_k:-:*:*:*:*:*:*:*
redhat integration_service_registry — cpe:2.3:a:redhat:integration_service_registry:-:*:*:*:*:*:*:*
redhat jboss_enterprise_application_platform — cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*
redhat jboss_enterprise_application_platform_expansion_pack — cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
redhat openshift_application_runtimes — cpe:2.3:a:redhat:openshift_application_runtimes:-:*:*:*:text-only:*:*:*
redhat openstack_platform 13.0 cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
redhat process_automation 7.0 cpe:2.3:a:redhat:process_automation:7.0:*:*:*:*:*:*:*
redhat single_sign-on — cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
redhat undertow < 2.2.24 cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
redhat undertow >= 2.3.0, < 2.3.5 cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
redhat openshift_container_platform 4.11 cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:*
redhat openshift_container_platform 4.12 cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:*
redhat openshift_container_platform_for_linuxone 4.9 cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.9:*:*:*:*:*:*:*
redhat openshift_container_platform_for_linuxone 4.10 cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.10:*:*:*:*:*:*:*
redhat openshift_container_platform_for_power 4.9 cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:*
redhat openshift_container_platform_for_power 4.10 cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:*
redhat jboss_enterprise_application_platform 7.4 cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*
redhat single_sign-on 7.6 cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:*
netapp oncommand_workflow_automation — cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

References for CVE-2023-1108

URL Tags
https://access.redhat.com/errata/RHSA-2023:1184 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:1185 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:1512 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:1513 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:1514 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:1516 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:2135
https://access.redhat.com/errata/RHSA-2023:3883 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3884 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3885 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3888 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3892 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3954 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4612 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-1108 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2174246 Issue Tracking
https://github.com/advisories/GHSA-m4mm-pg93-fv78
https://security.netapp.com/advisory/ntap-20231020-0002/ Third Party Advisory
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