CVE-2023-6291 – org.keycloak:keycloak-services

Package

Manager: maven
Name: org.keycloak:keycloak-services
Vulnerable Version: >=0 <23.0.3

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

EPSS: 0.00196 pctl0.41753

Details

The redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted An issue was found in the redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts. The problem arises in the verifyRedirectUri method, which attempts to enforce rules on user-controllable input, but essentially causes a desynchronization in how Keycloak and browsers interpret URLs. Keycloak, for example, receives "[www%2ekeycloak%2eorg%2fapp%2f:y@example.com](https://www%2ekeycloak%2eorg%2fapp%2f:y@example.com/)" and thinks the authority to be keycloak.org when it is actually example.com. This happens because the validation logic is performed on a URL decoded version, which no longer represents the original input. ### Acknowledgements Karel Knibbe

Metadata

Created: 2023-12-21T18:25:30Z
Modified: 2024-01-26T20:28:52Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/12/GHSA-mpwq-j3xf-7m5w/GHSA-mpwq-j3xf-7m5w.json
CWE IDs: ["CWE-20"]
Alternative ID: GHSA-mpwq-j3xf-7m5w
Finding: F184
Auto approve: 1