Input validation error in Keycloak - CVE-2020-1727

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Main Vulnerability Database Vulnerabilities #VU30168

Input validation error in Keycloak - CVE-2020-1727

Published: June 22, 2020 / Updated: July 17, 2020


Vulnerability identifier: #VU30168
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-1727
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote authenticated user to read and manipulate data.

A vulnerability was found in Keycloak before 9.0.2, where every Authorization URL that points to an IDP server lacks proper input validation as it allows a wide range of characters. This flaw allows a malicious to craft deep links that introduce further attack scenarios on affected clients.


Affected software

Keycloak
Red Hat Single Sign-On

How to mitigate CVE-2020-1727

Install update from vendor's website.

Keycloak - update to 9.0.2
Red Hat Single Sign-On - update to 7.4.0

External References

Related Security Bulletins