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Vulnerability of Xen: information disclosure via Speculative Code Store

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via Speculative Code Store of Xen, in order to obtain sensitive information on the host system.
Impacted products: XenServer, Xen.
Severity of this bulletin: 1/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 08/06/2021.
Références of this threat: CERTFR-2021-AVI-453, CERTFR-2021-AVI-460, CTX316324, CVE-2021-0089, CVE-2021-26313, VIGILANCE-VUL-35655, XSA-375.

Description of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via S...
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This computer weakness announce impacts software or systems such as XenServer, Xen.

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

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

This bulletin is about 2 vulnerabilities.

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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