CVE-2023-0657 Keycloak: impersonation via logout token exchange
An authenticated attacker can exchange a logout token for an access token to bypass permissions and access unauthorized data in Keycloak.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-0657?
CVE-2023-0657 is a low-severity authentication bypass vulnerability in Red Hat Single Sign-On 7, published on 17 Nov 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A flaw was found in Keycloak. This issue occurs due to improperly enforcing token types when validating signatures locally. This could allow an authenticated attacker to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.
Weakness: CWE-273
Which versions are affected by CVE-2023-0657?
4 open source packages ship an affected version, including org.keycloak:keycloak-services.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 22.0.10 |
org.keycloak:keycloak-services Maven | All versions | 22.0.10 |
org.keycloak:keycloak-services Maven | From 23.0.0 | 24.0.3 |
org.keycloak:keycloak-services Maven | From 23.0.0 | 24.0.3 |
How do I fix CVE-2023-0657?
Upgrade org.keycloak:keycloak-services to a fixed version for your release line: 22.0.10 or 24.0.3.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-0657 being exploited?
There is no known exploitation of CVE-2023-0657 in the wild and no public exploit code.
Sources
Also known as GHSA-7fpj-9hr8-28vh.