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Vulnerability of Keycloak: privilege escalation via CRL Signatures Validation

Synthesis of the vulnerability

An attacker can bypass restrictions via CRL Signatures Validation of Keycloak, in order to escalate his privileges.
Severity of this alert: 2/4.
Creation date: 12/06/2019.
Références of this alert: CVE-2019-3875, RHSA-2019:1456-01, VIGILANCE-VUL-29513.

Description of the vulnerability

An attacker can bypass restrictions via CRL Signatures Validation of Keycloak, in order to escalate his privileges.
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This computer weakness note impacts software or systems such as Red Hat SSO.

Our Vigil@nce team determined that the severity of this security bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this weakness announce.

Solutions for this threat

Red Hat Single Sign-On: version 7.3.2.
The version 7.3.2 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.rhsso&downloadType=securityPatches&version=7.3
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Vigil@nce provides computer security bulletins. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.