VMSA-2018-0012 : VMware vSphere, Workstation and Fusion updates enable Hypervisor-Assisted Guest Mitigations for Speculative Store Bypass issue (Spectre)

Medium Nessus Plugin ID 110901

Synopsis

The remote VMware ESXi host is missing one or more security-related patches.

Description

vCenter Server, ESXi, Workstation, and Fusion update speculative execution control mechanism for Virtual Machines (VMs). As a result, a patched Guest Operating System (GOS) can remediate the Speculative Store bypass issue (CVE-2018-3639) using the Speculative-Store- Bypass-Disable (SSBD) control bit. This issue may allow for information disclosure in applications and/or execution runtimes which rely on managed code security mechanisms. Based on current evaluations, we do not believe that CVE-2018-3639 could allow for VM to VM or Hypervisor to VM Information disclosure.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2018-3639 to this issue.

Solution

Apply the missing patches.

See Also

http://lists.vmware.com/pipermail/security-announce/2018/000417.html

Plugin Details

Severity: Medium

ID: 110901

File Name: vmware_VMSA-2018-0012.nasl

Version: 1.2

Type: local

Published: 2018/07/03

Modified: 2018/07/13

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N

Vulnerability Information

CPE: cpe:/o:vmware:esxi:5.5, cpe:/o:vmware:esxi:6.0, cpe:/o:vmware:esxi:6.5, cpe:/o:vmware:esxi:6.7

Required KB Items: Host/local_checks_enabled, Host/VMware/release, Host/VMware/version

Patch Publication Date: 2018/05/21

Reference Information

CVE: CVE-2018-3639, CVE-2018-3640

VMSA: 2018-0012

IAVB: 2018-B-0081, 2018-B-0082