VMSA-2018-0019.1

Horizon 6, 7, Horizon Agent, and Horizon Client for Windows updates address an out-of-bounds read vulnerability

VMware Security Advisory

VMware Security Advisory Advisory ID:

VMSA-2018-0019.1

VMware Security Advisory Severity:

Important

VMware Security Advisory Synopsis:

Horizon 6, 7, Horizon Agent, and Horizon Client for Windows updates address an out-of-bounds read vulnerability

VMware Security Advisory Issue date:

2018-08-07

VMware Security Advisory Updated on:

2018-08-14

VMware Security Advisory CVE numbers:

CVE-2018-6970

1. Summary

Horizon 6, 7, Horizon Agent, and Horizon Client for Windows updates address an out-of-bounds read vulnerability

2. Relevant Products

VMware Horizon 6
VMware Horizon 7
VMware Horizon Client for Windows
VMware Horizon View Agent
VMware Horizon Agents Installer (HAI)

3. Problem Description

Out-of-bounds read vulnerability in the Message Framework library

Horizon 6, 7, Horizon Agent, and Horizon Client for Windows contain an out-of-bounds read vulnerability in the Message Framework library. Successfully exploiting this issue may allow a less-privileged user to leak information from a privileged process running on a system where Horizon Connection Server, Horizon Agent or Horizon Client are installed.

Note: This issue doesn’t apply to Horizon 6, 7 Agents installed on Linux systems or Horizon Clients installed on non-Windows systems.

VMware would like to thank Steven Seeley (mr_me) of Source Incite working with Trend Micro's Zero Day Initiative for reporting this issue to us.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2018-6970 to this issue.

Column 5 of the following table lists the action required to remediate the vulnerability in each release, if a solution is available.

VMware Product

Product Version

Running on

Severity

Replace with/ Apply Patch

Mitigation/ Workaround

VMware Product Horizon 7

Product Version 7.x.x

Running on Windows

Severity Important

Replace with/ Apply Patch 7.5.1

Mitigation/ Workaround None

VMware Product Horizon 6

Product Version 6.x.x

Running on Windows

Severity Important

Replace with/ Apply Patch 6.2.7

Mitigation/ Workaround None

VMware Product Horizon Client for Windows

Product Version 4.x.x and prior

Running on Windows

Severity Important

Replace with/ Apply Patch 4.8.1

Mitigation/ Workaround None

VMware Product Horizon View Agent

Product Version 7.x.x and prior**

Running on Windows

Severity Important

Replace with/ Apply Patch 7.5.1

Mitigation/ Workaround None

VMware Product VMware Horizon Agents Installer

Product Version 18.x.x and prior

Running on Windows

Severity Important

Replace with/ Apply Patch 18.2.1*

Mitigation/ Workaround None

*Customers on HCS will need to upgrade to 18.2 (with HAI 18.2.1) or 18.3 (with HAI 18.2.1).

**Horizon View Agent (7.x.x and prior) is listed separately for Horizon Cloud customers using version 7.x.x who need to upgrade their agents but do not use the Horizon Enterprise Server Components (connection server, security server). Customers on Horizon Enterprise (Horizon 6 or Horizon 7) should ensure they upgrade Agents as part of applying the patches identified above for those products and versions.

4. Solution

Please review the patch/release notes for your product and version and verify the checksum of your downloaded file.

VMware Horizon 7 version 7.5.1
Downloads and Documentation:

https://my.vmware.com/en/web/vmware/info/slug/desktop_end_user_computing/vmware_horizon/7_5

VMware Horizon 6 version 6.2.7
Downloads and Documentation:
https://my.vmware.com/group/vmware/info?slug=desktop_end_user_computing/vmware_horizon/6_2

VMware Horizon Client for Windows 4.8.1
Downloads and Documentation:

https://my.vmware.com/web/vmware/details?productId=578&downloadGroup=CART19FQ2_WIN_4_8_1

VMware Horizon View Agent 7.5.1
Downloads and Documentation:

https://my.vmware.com/web/vmware/details?productId=757&downloadGroup=VIEW-751-ADV

VMware Horizon Agents Installer 18.2.1
Downloads and Documentation:

https://my.vmware.com/web/vmware/details?productId=716&downloadGroup=HCS-CH-1830