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Vulnerability of Hibernate Validator: privilege escalation via Message Interpolation Processor

Synthesis of the vulnerability 

An attacker can bypass restrictions via Message Interpolation Processor of Hibernate Validator, in order to escalate his privileges.
Vulnerable systems: WebSphere AS Liberty, JBoss EAP by Red Hat, Red Hat SSO.
Severity of this threat: 2/4.
Creation date: 17/08/2020.
Références of this weakness: 6348216, CVE-2020-10693, RHSA-2020:3461-01, RHSA-2020:3462-01, RHSA-2020:3463-01, RHSA-2020:3464-01, RHSA-2020:3495-01, RHSA-2020:3496-01, RHSA-2020:3497-01, RHSA-2020:3501-01, RHSA-2020:3637-01, RHSA-2020:3638-01, RHSA-2020:3639-01, RHSA-2020:3642-01, VIGILANCE-VUL-33092.

Description of the vulnerability 

An attacker can bypass restrictions via Message Interpolation Processor of Hibernate Validator, in order to escalate his privileges.
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This vulnerability bulletin impacts software or systems such as WebSphere AS Liberty, JBoss EAP by Red Hat, Red Hat SSO.

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

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

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

Red Hat JBoss EAP: version 7.2.9.
The version 7.2.9 is fixed:
  https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/

Red Hat JBoss EAP: version 7.3.2.
The version 7.3.2 is fixed:
  https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/

Red Hat Single Sign-On: version 7.4.2.
The version 7.4.2 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.rhsso&downloadType=securityPatches&version=7.4

WebSphere Application Server Liberty: patch for Hibernate Validator.
A patch is indicated in information sources.
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