CVE-2019-10201
First published: Wed Jul 10 2019(Updated: )
If an attacker modifies the SAML Response and removes the <Signature> Sections, the message is still accepted and the message can be modified, allowing the attacker to impersonate any user on the keycloak protected systems by modifying assertations. Upstream Issue: <a href="https://issues.jboss.org/browse/KEYCLOAK-10786">https://issues.jboss.org/browse/KEYCLOAK-10786</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/keycloak | <7.0.0 | 7.0.0 |
| Redhat Keycloak | <=6.0.1 | |
| Redhat Single Sign-on | =7.0 | |
| Redhat Single Sign-on | =7.3.3 |
Remedy
Administrator can prevent this issue for POST binding by requiring signed assertions.
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10201
- https://issues.jboss.org/browse/KEYCLOAK-10786
- https://access.redhat.com/errata/RHSA-2019:2483
- https://access.redhat.com/security/cve/cve-2019-10201
- https://access.redhat.com/errata/RHSA-2020:2067
- https://access.redhat.com/errata/RHSA-2020:2366
- https://bugzilla.redhat.com/show_bug.cgi?id=1728609
- https://www.cve.org/CVERecord?id=CVE-2019-10201 https://nvd.nist.gov/vuln/detail/CVE-2019-10201
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2019-10201?
CVE-2019-10201 is a vulnerability in Keycloak's SAML broker that allows an attacker to modify SAML Response messages without detection.
How severe is CVE-2019-10201?
CVE-2019-10201 has a severity score of 8.1 out of 10, indicating a high-risk vulnerability.
What is the affected software?
The affected software is Keycloak versions up to 6.0.1.
How can an attacker exploit CVE-2019-10201?
An attacker can exploit CVE-2019-10201 by modifying SAML Response messages and removing the <Signature> sections without detection.
How can I fix CVE-2019-10201?
To fix CVE-2019-10201, update Keycloak to version 7.0.0 or higher.
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