CVE-2023-0264 Keycloak vulnerable to user impersonation via stolen UUID code
An authenticated attacker can impersonate victims and generate session tokens by exploiting an OpenID Connect authentication flaw in Keycloak.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-0264?
CVE-2023-0264 is a medium-severity authentication bypass vulnerability in Redhat Keycloak, published on 4 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in Keycloaks OpenID Connect user authentication, which may incorrectly authenticate requests. An authenticated attacker who could obtain information from a user request within the same realm could use that data to impersonate the victim and generate new session tokens. This issue could impact confidentiality, integrity, and availability.
Weakness: CWE-287
Which versions are affected by CVE-2023-0264?
2 open source packages ship an affected version, including org.keycloak:keycloak-services. It affects 5 products.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 21.0.1 |
org.keycloak:keycloak-services Maven | All versions | 21.0.1 |
Products include Redhat Keycloak, Redhat Openshift Container Platform, Redhat Openshift Container Platform for Ibm Linuxone, Redhat Openshift Container Platform Ibm Z Systems, Redhat Single Sign-On.
How do I fix CVE-2023-0264?
Upgrade org.keycloak:keycloak-services to 21.0.1 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-0264 being exploited?
There is no known exploitation of CVE-2023-0264 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Redhat Keycloak
- CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC
- CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature
- CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability
- CVE-2019-14910 Keycloak Authentication Error
- CVE-2019-14909 Keycloak Authentication Error
Sources
Also known as GHSA-9g98-5mj6-f9mv.