Red Hat Single Sign-On 7.5.2 on RHEL 7 update for keycloak

1) Missing Authorization

EUVDB-ID: #VU62795

Risk: Medium

CVSSv4.0: 1.3 [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/E:U/U:Green]

CVE-ID: CVE-2022-1245

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to an error in the token exchange feature of keycloak. A client application holding a valid access token can exchange tokens for any target client by passing the client_id of the target. A remote user can bypass authorization process and escalate privileges within the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.5.2

rh-sso7-keycloak (Red Hat package): 15.0.6-1.redhat_00001.1.el7sso

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:rh-sso7-keycloak_redhat_package:15.0.6-1.redhat_00001.1.el7sso:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2022:1711
https://access.redhat.com/errata/RHSA-2022:1709

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.