Spoofing attack in Keycloak - CVE-2021-3424

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Main Vulnerability Database Vulnerabilities #VU53529

Spoofing attack in Keycloak - CVE-2021-3424

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


Vulnerability identifier: #VU53529
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3424
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Keycloak
Software vendor:
Keycloak

Description

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.

External links