HTTP Request Smuggling Affecting haproxy package, versions <2.0.10+git0.ac198b92-3.15.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
10.07% (96th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES150-HAPROXY-2722537
  • published14 Apr 2022
  • disclosed29 Nov 2019

Introduced: 29 Nov 2019

CVE-2019-18277  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 haproxy to version 2.0.10+git0.ac198b92-3.15.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream haproxy package and not the haproxy package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).

CVSS Base Scores

version 3.1