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Vulnerability of WebSphere AS: external XML entity injection

Synthesis of the vulnerability 

An attacker can transmit malicious XML data to WebSphere AS, in order to read a file, scan sites, or trigger a denial of service.
Vulnerable products: Rational ClearCase, WebSphere AS Traditional.
Severity of this weakness: 2/4.
Creation date: 09/02/2021.
Références of this bulletin: 6413709, 6416615, CVE-2021-20353, VIGILANCE-VUL-34536.

Description of the vulnerability 

An attacker can transmit malicious XML data to WebSphere AS, in order to read a file, scan sites, or trigger a denial of service.
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This cybersecurity weakness impacts software or systems such as Rational ClearCase, WebSphere AS Traditional.

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

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

An attacker with a expert ability can exploit this vulnerability bulletin.

Solutions for this threat 

WebSphere AS: patch for XXE.
A patch is indicated in information sources.

IBM Rational ClearCase: solution for WebSphere AS.
The solution is indicated in information sources.
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