CVE-2023-1108: Undertow core Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-m4mm-pg93-fv78
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CVSS 7.5
CWE-835
Published
Advisory Summary

CVE-2023-1108 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Undertow core libraries in the Maven ecosystem. The issue involves undertow denial of service vulnerability. Remediation is available by upgrading affected packages to version 2.3.5.Final, 2.2.24.Final.

CVE-2023-1108 at a Glance

CVE Identifier CVE-2023-1108
GHSA Identifier GHSA-m4mm-pg93-fv78
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Product Undertow core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-1108

To remediate this vulnerability, upgrade all affected Undertow core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

io.undertow:undertow-core fixed: 2.3.5.Final 
<dependency>
    <groupId>io.undertow</groupId>
    <artifactId>undertow-core</artifactId>
    <version>2.3.5.Final</version>
</dependency>
io.undertow:undertow-core fixed: 2.2.24.Final 
<dependency>
    <groupId>io.undertow</groupId>
    <artifactId>undertow-core</artifactId>
    <version>2.2.24.Final</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=io.undertow

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-1108, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.undertow

Analyze the terminal output to locate any version of Undertow core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.5.Final), your application is affected.

Note: The mvn dependency:tree -Dincludes=io.undertow command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'), where the product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. In Undertow core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2023-1108 Affected Undertow core Versions

2 component(s)
Fixed Versions:
2.3.5.Final2.2.24.Final
Product / Package Ecosystem Affected Versions Fixed Version
io.undertow:undertow-core
maven/io.undertow/undertow-core
Maven
≥ 2.3.0
< 2.3.5.Final
2.3.5.Final
io.undertow:undertow-core
maven/io.undertow/undertow-core
Maven
< 2.2.24.Final
2.2.24.Final

References

NVD — CVE-2023-1108 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-1108
Undertow core Source Repository REPOSITORY
https://github.com/undertow-io/undertow/pull/1457
Security Fix Commit FIX COMMIT
https://github.com/undertow-io/undertow/commit/ccc053b55f5de9872bc1a4999fd6aa85fc5e146d
Security Fix Commit FIX COMMIT
https://github.com/undertow-io/undertow/commit/1b763064a41a30583b5df9a118898513007a70be
Undertow core Security Information SECURITY
https://security.netapp.com/advisory/ntap-20231020-0002
Security Fix Commit FIX COMMIT
https://github.com/undertow-io/undertow/commit/1302c8cf4476936802504efe0d36c58dcd954f78
Undertow core Source Repository REPOSITORY
https://github.com/undertow-io/undertow
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-m4mm-pg93-fv78
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2174246
Undertow core Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2023-1108
access.redhat.com/errata/rhsa-2023:46... WEB
https://access.redhat.com/errata/RHSA-2023:4612
access.redhat.com/errata/rhsa-2023:39... WEB
https://access.redhat.com/errata/RHSA-2023:3954
access.redhat.com/errata/rhsa-2023:38... WEB
https://access.redhat.com/errata/RHSA-2023:3892
access.redhat.com/errata/rhsa-2023:38... WEB
https://access.redhat.com/errata/RHSA-2023:3888
access.redhat.com/errata/rhsa-2023:38... WEB
https://access.redhat.com/errata/RHSA-2023:3885
access.redhat.com/errata/rhsa-2023:38... WEB
https://access.redhat.com/errata/RHSA-2023:3884
access.redhat.com/errata/rhsa-2023:38... WEB
https://access.redhat.com/errata/RHSA-2023:3883
access.redhat.com/errata/rhsa-2023:21... WEB
https://access.redhat.com/errata/RHSA-2023:2135
access.redhat.com/errata/rhsa-2023:15... WEB
https://access.redhat.com/errata/RHSA-2023:1516
access.redhat.com/errata/rhsa-2023:15... WEB
https://access.redhat.com/errata/RHSA-2023:1514
access.redhat.com/errata/rhsa-2023:15... WEB
https://access.redhat.com/errata/RHSA-2023:1513
access.redhat.com/errata/rhsa-2023:15... WEB
https://access.redhat.com/errata/RHSA-2023:1512
access.redhat.com/errata/rhsa-2023:11... WEB
https://access.redhat.com/errata/RHSA-2023:1185
access.redhat.com/errata/rhsa-2023:11... WEB
https://access.redhat.com/errata/RHSA-2023:1184

Frequently Asked Questions

What is CVE-2023-1108?
CVE-2023-1108 is a security vulnerability in Undertow core involving Undertow denial of service vulnerability under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Undertow core versions are affected?
Affected versions include releases prior to 2.3.5.Final, 2.2.24.Final across affected packages: io.undertow:undertow-core.
What version fixes CVE-2023-1108?
Upgrading to 2.3.5.Final, 2.2.24.Final (or the latest patched release for your respective branch) resolves the vulnerability.
Is undertow-core affected?
Yes, io.undertow:undertow-core is affected in releases prior to 2.3.5.Final, 2.2.24.Final. Upgrade your dependency to 2.3.5.Final, 2.2.24.Final or later.
What is the CVSS score of CVE-2023-1108?
CVE-2023-1108 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2023-1108?
CVE-2023-1108 is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') (The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.).
How can I check Maven dependencies for CVE-2023-1108?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.undertow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m4mm-pg93-fv78",
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  } ],
  "references" : [ {
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  }, {
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  }, {
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    "url" : "https://github.com/undertow-io/undertow/commit/ccc053b55f5de9872bc1a4999fd6aa85fc5e146d"
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  }, {
    "type" : "WEB",
    "url" : "https://security.netapp.com/advisory/ntap-20231020-0002"
  }, {
    "type" : "PACKAGE",
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  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-m4mm-pg93-fv78"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2174246"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2023-1108"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:4612"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3954"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3892"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3888"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3885"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3884"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:3883"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:2135"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1516"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1514"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1513"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1512"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1185"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2023:1184"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-15T13:37:03Z",
    "nvd_published_at" : "2023-09-14T15:15:08Z"
  }
}