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ID de Prueba:1.3.6.1.4.1.25623.1.0.106912
Categoría:Citrix Xenserver Local Security Checks
Título:Citrix XenServer Multiple Security Updates (CTX223291)
Resumen:A number of security issues have been identified within Citrix XenServer.
Descripción:Summary:
A number of security issues have been identified within Citrix XenServer.

Vulnerability Insight:
The most significant of these issues could, if exploited, allow a malicious
administrator of a 64-bit PV guest VM to compromise the host. This issue has the identifier:

- CVE-2017-7228 (High): x86: broken check in memory_exchange() permits PV guest breakout

In addition, an issue has been identified that, in certain deployments, allows a guest VM to perform a denial of
service attack against the host by repeatedly rebooting many times.

- (Low): memory leak when destroying guest without PT devices

A further issue has been identified that, in certain deployments, might allow unprivileged code within a guest to
escalate its privilege level within that same guest. This issue has the identifier:

- CVE-2016-10013 (Low): x86: Mishandling of SYSCALL singlestep during emulation

Affected Software/OS:
XenServer versions 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-2017-7228
BugTraq ID: 97375
http://www.securityfocus.com/bid/97375
Debian Security Information: DSA-3847 (Google Search)
http://www.debian.org/security/2017/dsa-3847
https://www.exploit-db.com/exploits/41870/
https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.html
http://www.securitytracker.com/id/1038223
CopyrightCopyright (C) 2017 Greenbone Networks GmbH

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