Check Point Advisories

HaProxy HTTP Request Smuggling (CVE-2019-18277)

Check Point Reference: CPAI-2019-2203
Date Published: 28 Jul 2020
Severity: High
Last Updated: 28 Jul 2020
Industry Reference:CVE-2019-18277
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? HaProxy prior to 2.0
Vulnerability Description An Improper Input Validation exists in HaProxy. Messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. Successful exploitation could result in HTTP request smuggling vulnerability.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the HaProxy HTTP Request Smuggling (CVE-2019-18277) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  HaProxy HTTP Request Smuggling (CVE-2019-18277)

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