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VMware Security Advisories
| Advisory ID | VMSA-2019-0022.1 |
| Advisory Severity | Critical |
| CVSSv3 Range | 9.8 |
| Synopsis | VMware ESXi and Horizon DaaS updates address OpenSLP remote code execution vulnerability (CVE-2019-5544) |
| Issue Date | 2019-12-05 |
| Updated On | 2020-05-08 |
| CVE(s) | CVE-2019-5544 |
1. Impacted Products
- VMware ESXi
- VMware Horizon DaaS
2. Introduction
A vulnerability in OpenSLP was privately reported to VMware. Patches and workarounds are available to address this vulnerability in affected VMware products.
3. VMware ESXi and Horizon DaaS updates address OpenSLP remote code execution vulnerability (CVE-2019-5544)
Description:
OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.
Known Attack Vectors:
A malicious actor with network access to port 427 on an ESXi host or on any Horizon DaaS management appliance may be able to overwrite the heap of the OpenSLP service resulting in remote code execution.
Resolution:
To remediate CVE-2019-5544 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' below.
Workarounds:
Workarounds for CVE-2019-5544 have been documented in the VMware Knowledge Base articles listed in the 'Workarounds' column of the 'Response Matrix' below.
Additional Documentation:
None.
Notes:
None.
Acknowledgements:
VMware would like to thank the 360Vulcan team working with the 2019 Tianfu Cup Pwn Contest for reporting this issue to us.
Response Matrix:
| Product | Version | Running On | CVE Identifier | CVSSV3 | Severity | Fixed Version | Workarounds | Additional Documents |
| ESXi | 6.7 | Any | CVE-2019-5544 | 9.8 | Critical | ESXi670-201912001 | KB76372 | None |
| ESXi | 6.5 | Any | CVE-2019-5544 | 9.8 | Critical | ESXi650-201912001 |
KB76372 | None |
| ESXi | 6.0 | Any | CVE-2019-5544 | 9.8 | Critical | ESXi600-201912001 |
KB76372 | None |
| Horizon DaaS | 8.x | Virtual Appliance | CVE-2019-5544 | 9.8 | Critical | 9.0.0.0 | KB76411 | None |
4. References
Fixed Version(s) and Release Notes:
ESXi 6.7 Patch Release ESXi670-201912001
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-201912001.html
ESXi 6.5 Patch Release ESXi650-201912001
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-201912001.html
ESXi 6.0 Patch Release ESXi600-201912001
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.0/rn/esxi600-201912001.html
Horizon DaaS 9.0.0.0
https://my.vmware.com/web/vmware/details?downloadGroup=HORIZON_DAAS_900&productId=743
https://docs.vmware.com/en/VMware-Horizon-DaaS/services/rn/Horizon-DaaS-900-Release-Notes.html
Workarounds:
https://kb.vmware.com/s/article/76372
https://kb.vmware.com/s/article/76411
FIRST CVSSv3 Calculator:
CVE-2019-5544 - https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5544
5. Change log
2019-12-05: VMSA-2019-0022
Initial security advisory in conjunction with the release of ESXi patches on 2019-12-05.
2020-05-08: VMSA-2019-0022.1
Updated advisory after release of Horizon DaaS 9.0.0.0 on 2020-05-07.
6. Contact
E-mail list for product security notifications and announcements:
https://lists.vmware.com/cgi-bin/mailman/listinfo/security-announce
This Security Advisory is posted to the following lists:
security-announce@lists.vmware.com
E-mail: security@vmware.com
PGP key at:
VMware Security Advisories
https://www.vmware.com/security/advisories
VMware Security Response Policy
https://www.vmware.com/support/policies/security_response.html
VMware Lifecycle Support Phases
https://www.vmware.com/support/policies/lifecycle.html
VMware Security & Compliance Blog
https://blogs.vmware.com/security
Copyright 2019 VMware Inc. All rights reserved.