CVE-2019-10157 Forced Logout in keycloak-connect
An attacker with local access can craft a malicious token to prevent user access indefinitely due to improper token verification in the Keycloak Node.js adapter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-10157?
CVE-2019-10157 is a medium-severity authentication bypass vulnerability in Redhat Keycloak, published on 12 Jun 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
Which versions are affected by CVE-2019-10157?
2 open source packages ship an affected version, including keycloak-connect. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
keycloak-connect npm | All versions | 4.8.3 |
keycloak-connect npm | All versions | 4.8.3 |
Products include Redhat Keycloak, Redhat Single Sign-On.
How do I fix CVE-2019-10157?
Upgrade keycloak-connect to 4.8.3 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-10157 being exploited?
There is no known exploitation of CVE-2019-10157 in the wild and no public exploit code.
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-68hw-vfh7-xvg8.