CVE intelligence and bounded remediation

CVE-2023-34037 — VMware Horizon Server contains a HTTP request smuggling vulnerability

Medium CVSS 5.3

VMware Horizon Server contains a HTTP request smuggling vulnerability. A malicious actor with network access may be able to perform HTTP smuggle requests.

Severity
Medium
CVSS
5.3 (3.1)
Published
2023-08-04
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-444

Affected products

  • vmware / horizon_client / 2006
  • vmware / horizon_client / 2012
  • vmware / horizon_client / 2103
  • vmware / horizon_client / 2106
  • vmware / horizon_client / 2111
  • vmware / horizon_client / 2111.1

Showing 6 representative product identities from 8 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

HTTP request smuggling and message-boundary ambiguity

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Check exposure

  • Inventory every proxy, CDN, gateway, load balancer, service mesh, and application server hop on affected request paths.
  • Compare documented parsing and normalization behavior for message length, transfer coding, duplicate headers, and protocol translation.
  • Identify connection reuse and which downstream services trust headers added by intermediaries.

Remediate safely

  • Update affected intermediaries and origin servers and align them on a single standards-compliant request framing policy.
  • Reject ambiguous length, transfer-coding, duplicate, malformed, and unsupported framing before forwarding.
  • Normalize or remove hop-by-hop and identity headers at one controlled boundary and add multi-hop regression tests.

Authoritative sources

Complete CVE record and remediation plan

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