RHEL 8 : Red Hat Single Sign-On 7.6.6 security update on RHEL 8 (Important) (RHSA-2023:7483)

medium Nessus Plugin ID 186248


The remote Red Hat host is missing one or more security updates.


The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7483 advisory.

- A flaw was found in Keycloak. This flaw allows impersonation and lockout due to the email trust not being handled correctly in Keycloak. An attacker can shadow other users with the same email and lockout or impersonate them. (CVE-2023-0105)

- Bouncy Castle For Java before 1.74 is affected by an LDAP injection vulnerability. The vulnerability only affects applications that use an LDAP CertStore from Bouncy Castle to validate X.509 certificates. During the certificate validation process, Bouncy Castle inserts the certificate's Subject Name into an LDAP search filter without any escaping, which leads to an LDAP injection vulnerability. (CVE-2023-33201)

- The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Update the affected rh-sso7-keycloak and / or rh-sso7-keycloak-server packages.

See Also





Plugin Details

Severity: Medium

ID: 186248

File Name: redhat-RHSA-2023-7483.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/24/2023

Updated: 2/9/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: High

Score: 7.1


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2023-0105


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:rh-sso7-keycloak, p-cpe:/a:redhat:enterprise_linux:rh-sso7-keycloak-server

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/24/2023

Vulnerability Publication Date: 1/13/2023

CISA Known Exploited Vulnerability Due Dates: 10/31/2023

Reference Information

CVE: CVE-2023-0105, CVE-2023-33201, CVE-2023-44487

CWE: 200, 400, 841

RHSA: 2023:7483