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Vulnerability of Undertow: information disclosure via Field Name Parsing

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Field Name Parsing of Undertow, in order to obtain sensitive information.
Impacted systems: JBoss EAP by Red Hat, Red Hat SSO.
Severity of this alert: 2/4.
Creation date: 17/08/2020.
Références of this alert: CVE-2020-1710, 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-33089.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Field Name Parsing of Undertow, in order to obtain sensitive information.
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This computer vulnerability bulletin impacts software or systems such as JBoss EAP by Red Hat, Red Hat SSO.

Our Vigil@nce team determined that the severity of this vulnerability 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 threat 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
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