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Vulnerability of Undertow: information disclosure via HTTP Request Smuggling

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via HTTP Request Smuggling of Undertow, in order to obtain sensitive information.
Impacted products: JBoss EAP by Red Hat, Red Hat SSO.
Severity of this bulletin: 2/4.
Creation date: 16/03/2021.
Références of this threat: CVE-2021-20220, RHSA-2021:0872-01, RHSA-2021:0873-01, RHSA-2021:0874-01, RHSA-2021:0885-01, RHSA-2021:0967-01, RHSA-2021:0968-01, RHSA-2021:0969-01, RHSA-2021:0974-01, VIGILANCE-VUL-34863.

Description of the vulnerability 

An attacker can bypass access restrictions to data via HTTP Request Smuggling of...
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This computer weakness announce impacts software or systems such as JBoss EAP by Red Hat, Red Hat SSO.

Our Vigil@nce team determined that the severity of this security alert 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 vulnerability.

Solutions for this threat 

This vulnerability fix will be public soon.
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Computer vulnerabilities tracking service 

Vigil@nce provides an application vulnerability alert. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.