CVE-2020-10776: XSS
First published: Tue Jun 16 2020(Updated: )
A flaw was found in Keycloak before version 12.0.0, where it is possible to add unsafe schemes for the redirect_uri parameter. This flaw allows an attacker to perform a Cross-site scripting attack.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/rh-sso7-keycloak | <0:9.0.9-1.redhat_00001.1.el6 | 0:9.0.9-1.redhat_00001.1.el6 |
| redhat/rh-sso7-keycloak | <0:9.0.9-1.redhat_00001.1.el7 | 0:9.0.9-1.redhat_00001.1.el7 |
| redhat/rh-sso7-keycloak | <0:9.0.9-1.redhat_00001.1.el8 | 0:9.0.9-1.redhat_00001.1.el8 |
| redhat/rh-sso7-libunix-dbus-java | <0:0.8.0-2.el8 | 0:0.8.0-2.el8 |
| Redhat Keycloak | <12.0.0 | |
| redhat/keycloak | <12.0.0 | 12.0.0 |
| maven/org.keycloak:keycloak-services | <12.0.0 | 12.0.0 |
| maven/org.keycloak:keycloak-server-spi-private | <12.0.0 | 12.0.0 |
Remedy
Trusted Hosts Policy could be used to mitigate this attack : https://www.keycloak.org/docs/latest/securing_apps/index.html#client-registration-policies
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-10776 https://nvd.nist.gov/vuln/detail/CVE-2020-10776
- https://bugzilla.redhat.com/show_bug.cgi?id=1847428
- https://access.redhat.com/errata/RHSA-2020:4931
- https://access.redhat.com/errata/RHSA-2020:4929
- https://access.redhat.com/errata/RHSA-2020:4930
- https://access.redhat.com/errata/RHSA-2020:4932
- https://access.redhat.com/security/cve/cve-2020-10776
- https://issues.redhat.com/browse/KEYCLOAK-14306
- https://www.keycloak.org/docs/latest/securing_apps/index.html#client-registration-policies
- https://nvd.nist.gov/vuln/detail/CVE-2020-10776
- https://github.com/keycloak/keycloak/commit/01be601dbdd77822827de173e34180d9322db85c
- https://github.com/advisories/GHSA-484q-784p-8m5h (Advisory)
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-10776?
CVE-2020-10776 is a vulnerability found in Keycloak before version 12.0.0 that allows an attacker to perform a Cross-site scripting attack.
What is the severity of CVE-2020-10776?
CVE-2020-10776 has a severity level of medium (4) based on the CVSS score.
How can an attacker exploit CVE-2020-10776?
An attacker can exploit CVE-2020-10776 by adding unsafe schemes for the redirect_uri parameter, enabling them to perform a Cross-site scripting attack.
What is the affected software for CVE-2020-10776?
Keycloak before version 12.0.0 is affected by CVE-2020-10776.
How can I fix CVE-2020-10776?
To fix CVE-2020-10776, upgrade to Keycloak version 12.0.0 or higher.
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