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Vulnerability of Undertow: information disclosure via HTTP Requests Invalid Characters

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via HTTP Requests Invalid Characters of Undertow, in order to obtain sensitive information.
Vulnerable software: JBoss EAP by Red Hat, Red Hat SSO.
Severity of this announce: 2/4.
Creation date: 17/08/2020.
Références of this computer vulnerability: CVE-2020-10687, 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-33091.

Description of the vulnerability 

An attacker can bypass access restrictions to data via HTTP Requests Invalid Characters of Undertow, in order to obtain sensitive information.
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This computer weakness alert impacts software or systems such as JBoss EAP by Red Hat, Red Hat SSO.

Our Vigil@nce team determined that the severity of this weakness note 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 bulletin.

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
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