SB2021052530 - Multiple vulnerabilities in Keycloak

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Main Vulnerability Database SB2021052530

SB2021052530 - Multiple vulnerabilities in Keycloak

Published: May 25, 2021 Updated: May 25, 2021

Security Bulletin ID SB2021052530
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Insufficient Session Expiration (CVE-ID: CVE-2021-3461)

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to the way Keycloak handles backchannel logout requests. If the logout request comes from an external SAML identity provider and Principal Type is set to Attribute [Name], the application ignores such request.


2) Spoofing attack (CVE-ID: CVE-2021-3424)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user IDN names. A remote attacker can register with an IDN name, which looks exactly like a name of previously registered user and trick the application administrator into assigning higher privileges to such account.


Remediation

Install update from vendor's website.

References