CVE-2023-3223 | Undertow: outofmemoryerror due to @multipartconfig handling

A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to null.

Published: 2023-09-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-3223 is rated Moderate Risk (54.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.65%). 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-2023-3223

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 2026-05-22 0.88% 0.65% -0.23%
2 2025-11-21 6.46% 0.88% -5.58%
3 2025-11-18 — 6.46% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3223

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-2023-3223

GitHub Security Advisory for CVE-2023-3223

GHSA-65h2-wf7m-q2v8 · Severity: high · Ecosystem: maven — Undertow vulnerable to denial of service

OS Trackers for CVE-2023-3223

vendor priority summary link
debian not yet assigned CVE-2023-3223 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-2023-3223
redhat high — https://access.redhat.com/security/cve/CVE-2023-3223
ubuntu medium CVE-2023-3223 medium priority: Ubuntu including 1 source packages (undertow), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 3, DNE 2. https://ubuntu.com/security/CVE-2023-3223

Affected software / configurations for CVE-2023-3223

Vendor Product Version Raw CPE
redhat undertow < 2.2.24 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_ibm_linuxone 4.9 cpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:4.9:*:*:*:*:*:*:*
redhat openshift_container_platform_for_ibm_linuxone 4.10 cpe:2.3:a:redhat:openshift_container_platform_for_ibm_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_text-only_advisories — cpe:2.3:a:redhat:jboss_enterprise_application_platform_text-only_advisories:-:*:*:*:*:*:*:*
redhat single_sign-on — cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
redhat single_sign-on 7.6 cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:*
redhat jboss_enterprise_application_platform 7.4 cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*

References for CVE-2023-3223

URL Tags
https://access.redhat.com/errata/RHSA-2023:4505 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4506 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4507 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4509 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4918 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4919 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4920 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4921 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:4924 Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:7247
https://access.redhat.com/security/cve/CVE-2023-3223 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2209689 Issue Tracking Vendor Advisory
https://security.netapp.com/advisory/ntap-20231027-0004/
cvelogic Threat Intelligence