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Vulnerability of Xen: information disclosure via Uncleaned ARM Cache

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via Uncleaned ARM Cache of Xen, in order to obtain sensitive information on the host system.
Vulnerable systems: Fedora, Xen.
Severity of this threat: 1/4.
Creation date: 16/02/2021.
Références of this weakness: CERTFR-2021-AVI-123, CVE-2021-26933, FEDORA-2021-47f53a940a, FEDORA-2021-4c819bf1ad, VIGILANCE-VUL-34592, XSA-364.

Description of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via U...
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This computer vulnerability impacts software or systems such as Fedora, Xen.

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

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

An attacker with a expert ability can exploit this weakness.

Solutions for this threat 

This vulnerability solution will be public soon.
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