NetSight
IP …
high7.1

CVE-2023-6291

The redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted

Impact

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 This happens because the validation logic is performed on a URL decoded version, which no longer represents the original input.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

Affected packages

EcosystemPackageAffectedFixed in
mavenorg.keycloak:keycloak-services< 23.0.323.0.3

Affected products

VendorProductAffected versions
RedhatKeycloak
before 22.0.7
RedhatSingle Sign-On
All versions
Version 7.6
RedhatOpenshift Container Platform
Versions 4.11, 4.12
RedhatOpenshift Container Platform For Ibm Z
Versions 4.9, 4.10
RedhatOpenshift Container Platform For Linuxone
Versions 4.9, 4.10
RedhatOpenshift Container Platform For Power
Versions 4.9, 4.10
RedhatMigration Toolkit For Applications
Versions 6.0, 7.0

Weakness classification

CWE-601CWE-20

References