Multiple vulnerabilities in Red Hat Single Sign-On 7.4
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-3424 CVE-2021-3461 |
| CWE-ID | CWE-451 CWE-613 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
rh-sso7-keycloak (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Single Sign-On Server applications / Directory software, identity management |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Spoofing attack
EUVDB-ID: #VU53529
Risk: Medium
CVSSv4.0: 2.7 [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 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's website.
rh-sso7-keycloak (Red Hat package): before 9.0.13-1.redhat_00006.1.el8sso
Red Hat Single Sign-On: before 7.4.7
CPE2.3- cpe:2.3:a:red_hat:rh-sso7-keycloak_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_single_sign-on:*:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2021:2065
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Insufficient Session Expiration
EUVDB-ID: #VU53530
Risk: Low
CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3461
CWE-ID:
CWE-613 - Insufficient Session Expiration
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's website.
rh-sso7-keycloak (Red Hat package): before 9.0.13-1.redhat_00006.1.el8sso
Red Hat Single Sign-On: before 7.4.7
CPE2.3- cpe:2.3:a:red_hat:rh-sso7-keycloak_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_single_sign-on:*:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2021:2065
Q & A
Can this vulnerability be exploited remotely?
No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
