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ID de Prueba:1.3.6.1.4.1.25623.1.0.140421
Categoría:Citrix Xenserver Local Security Checks
Título:Citrix XenServer Multiple Security Updates (CTX228867)
Resumen:A number of security vulnerabilities have been identified in Citrix; XenServer that may allow a malicious administrator of a guest VM to compromise the host.
Descripción:Summary:
A number of security vulnerabilities have been identified in Citrix
XenServer that may allow a malicious administrator of a guest VM to compromise the host.

Vulnerability Insight:
The following vulnerabilities have been addressed:

- CVE-2017-15595: Unlimited recursion in linear pagetable de-typing

- CVE-2017-15588: Stale TLB entry due to page type release race

- CVE-2017-15593: page type reference leak on x86

- CVE-2017-15592: x86: Incorrect handling of self-linear shadow mappings with translated guests

- CVE-2017-15594: x86: Incorrect handling of IST settings during CPU hotplug

- CVE-2017-15590: multiple MSI mapping issues on x86

- CVE-2017-15589: hypervisor stack leak in x86 I/O intercept code

For customers that do not have PV-based guests, are not using PCI passthrough and are using hardware with HAP
support, the risk is reduced to a disclosure of a small part of the hypervisor stack.

Affected Software/OS:
XenServer versions 7.2, 7.1, 7.0, 6.5, 6.2.0, 6.0.2.

Solution:
Apply the hotfix referenced in the advisory.

CVSS Score:
7.2

CVSS Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Referencia Cruzada: Common Vulnerability Exposure (CVE) ID: CVE-2017-15595
Common Vulnerability Exposure (CVE) ID: CVE-2017-15588
Common Vulnerability Exposure (CVE) ID: CVE-2017-15593
Common Vulnerability Exposure (CVE) ID: CVE-2017-15592
Common Vulnerability Exposure (CVE) ID: CVE-2017-15594
Common Vulnerability Exposure (CVE) ID: CVE-2017-15590
Common Vulnerability Exposure (CVE) ID: CVE-2017-15589
CopyrightCopyright (C) 2017 Greenbone Networks GmbH

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