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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This advisory has been withdrawn because it is a duplicate of GHSA-jgwc-jh89-rpgq.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.

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#vulnerability#dos#git#java#maven
  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. GHSA-pcx7-8hxg-j823

Duplicate Advisory: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

Moderate severity GitHub Reviewed Published Nov 25, 2024 to the GitHub Advisory Database • Updated Nov 25, 2024

Withdrawn This advisory was withdrawn on Nov 25, 2024

Package

maven org.keycloak:keycloak-quarkus-server (Maven)

Affected versions

< 24.0.9

>= 25.0.0, < 26.0.6

Patched versions

24.0.9

26.0.6

Published by the National Vulnerability Database

Nov 25, 2024

Published to the GitHub Advisory Database

Nov 25, 2024

Last updated

Nov 25, 2024

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