Moderate

VMSA-2023-0017
5.3
2023-08-03
2023-08-03 (Initial Advisory)
CVE-2023-34037, CVE-2023-34038
VMware Horizon Server updates address multiple security vulnerabilities (CVE-2023-34037, CVE-2023-34038)
1. Impacted Products
  • VMware Horizon Server
2. Introduction

Multiple vulnerabilities in VMware Horizon Server were responsibly reported to VMware. Updates are available to remediate these vulnerabilities in affected VMware products. 

3a. Request smuggling vulnerability (CVE-2023-34037)

Description

VMware Horizon Server contains a HTTP request smuggling vulnerability. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.

Known Attack Vectors

A malicious actor with network access may be able to perform HTTP smuggle requests.

Resolution

To remediate CVE-2023-34037 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' below.

Workarounds

None.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Ricter Z, and Matt Landers of OccamSec for independently reporting this issue to us.

3b. Information disclosure vulnerability (CVE-2023-34038)

Description

VMware Horizon Server contains an information disclosure vulnerability. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.

Known Attack Vectors

A malicious actor with network access may be able to access information relating to the internal network configuration.

 

Resolution

To remediate CVE-2023-34038 apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' below.

Workarounds

None.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Matt Landers of OccamSec for reporting this issue to us.

Response Matrix

Product Version Running On CVE Identifier CVSSv3 Severity Fixed Version Workarounds Additional Documentation
VMware Horizon Server
2306
Any
N/A
N/A
N/A
Unaffected
N/A
N/A
VMware Horizon Server
2303.x
Any
CVE-2023-34037, CVE-2023-34038
moderate
None
None
VMware Horizon Server
2212.x
Any
CVE-2023-34037, CVE-2023-34038
moderate
None
None
VMware Horizon Server
2209.x, 2206, 2203
Any
CVE-2023-34037, CVE-2023-34038
moderate
None
None
VMware Horizon Server
2111.x, 2106, 2103, 2012, 2006
Any
CVE-2023-34037, CVE-2023-34038
moderate
None
None
4. References
5. Change Log

2023-08-03: VMSA-2023-0017
Initial security advisory.

6. Contact

E-mail: security@vmware.com

PGP key at:
https://kb.vmware.com/kb/1055 

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 

Twitter
https://twitter.com/VMwareSRC

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