4.7

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

GHSA ID

GHSA-pcx7-8hxg-j823

EPSS Score

CWE

CWE-444

Published

11/25/2024

Updated

11/25/2024

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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GHSA-pcx7-8hxg-j823

GHSA-pcx7-8hxg-j823: Duplicate Advisory: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-jgwc-jh89-rpgq. This link is maintained to preserve external references.

Original Description

A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service. The attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.

(GitHub Advisory)

Miggo Vulnerability Database

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GHSA-pcx7-8hxg-j823

GHSA-pcx7-8hxg-j823:

4.7

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

GHSA ID

GHSA-pcx7-8hxg-j823

EPSS Score

CWE

CWE-444

Published

11/25/2024

Updated

11/25/2024

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.keycloak:keycloak-quarkus-server	maven	< 24.0.9	24.0.9
org.keycloak:keycloak-quarkus-server	maven	>= 25.0.0, < 26.0.6	26.0.6

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from processing proxy header values as hostnames requiring DNS resolution. Key functions identified:

QuarkusClientConnection.getRemoteAddr() originally returned hostnames from proxy headers
SslRequired security checks (isRequired/isLocal) performed DNS lookups via InetAddress.getByName()
WelcomeResource.isLocal() directly resolved connection addresses Patch changes in these locations show conversion to IP-only handling and DNS avoidance, confirming their role in the vulnerability flow. High confidence for functions directly handling proxy data, medium for WelcomeResource which was secondary validation.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

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4.7

-

Basic Information

Basic Information

Concerned about an active attack path?

GHSA-pcx7-8hxg-j823: Duplicate Advisory: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

Duplicate Advisory

Original Description

GHSA-pcx7-8hxg-j823:

4.7

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Basic Information

Basic Information

4.7

4.7

GHSA-pcx7-8hxg-j823: Duplicate Advisory: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

Duplicate Advisory

Original Description

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI