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vulnerability alert CVE-2016-7094

Xen: denial of service via HVM sh_ctxt->seg_reg

Synthesis of the vulnerability

An attacker, who is privileged in a guest system, can generate a fatal error via HVM sh_ctxt->seg_reg of Xen, in order to trigger a denial of service on the host system.
Vulnerable software: XenServer, Debian, Fedora, openSUSE, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Xen.
Severity of this announce: 1/4.
Consequences of an intrusion: denial of service on server, denial of service on service.
Attacker's origin: privileged shell.
Creation date: 08/09/2016.
Références of this computer vulnerability: CERTFR-2016-AVI-301, CERTFR-2016-AVI-303, CTX216071, CVE-2016-7094, DLA-614-1, DSA-3663-1, FEDORA-2016-1c3374bcb9, FEDORA-2016-7d2c67d1f5, openSUSE-SU-2016:2494-1, openSUSE-SU-2016:2497-1, SUSE-SU-2016:2473-1, SUSE-SU-2016:2507-1, SUSE-SU-2016:2528-1, SUSE-SU-2016:2533-1, SUSE-SU-2016:2725-1, VIGILANCE-VUL-20551, XSA-187.

Description of the vulnerability

An attacker, who is privileged in a guest system, can generate a fatal error via HVM sh_ctxt->seg_reg of Xen, in order to trigger a denial of service on the host system.
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