Keycloak up to 15.1.0 REST API authorization

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.00

A vulnerability classified as problematic was found in Keycloak up to 15.1.0. This vulnerability affects some unknown processing of the component REST API. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-863. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

The weakness was presented 01/26/2022 as GHSA-83x4-9cwr-5487. The advisory is available at github.com. This vulnerability was named CVE-2021-4133 since 12/17/2021. The exploitation appears to be easy. Access to the local network is required for this attack to succeed. Required for exploitation is a single authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 15.1.1 eliminates this vulnerability.

Productinfoedit

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2infoedit

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-863
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Keycloak 15.1.1

Timelineinfoedit

12/17/2021 CVE reserved
01/26/2022 +40 days Advisory disclosed
01/26/2022 +0 days VulDB entry created
01/28/2022 +2 days VulDB last update

Sourcesinfoedit

Advisory: GHSA-83x4-9cwr-5487
Status: Confirmed

CVE: CVE-2021-4133 (🔒)

Entryinfoedit

Created: 01/26/2022 09:49 AM
Updated: 01/28/2022 06:33 PM
Changes: (1) source_cve_nvd_summary
Complete: 🔍

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