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Citrix XenServer Multiple Security Updates (CTX228867)

Information

Severity

Severity

High

Family

Family

Citrix Xenserver Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.2

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

3 years ago

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: - 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

Affected Software

XenServer versions 7.2, 7.1, 7.0, 6.5, 6.2.0, 6.0.2.

Solution

Solution

Apply the hotfix referenced in the advisory.