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Ubuntu: USN-4174-1 (CVE-2019-18277): HAproxy vulnerability

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Ubuntu: USN-4174-1 (CVE-2019-18277): HAproxy vulnerability

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
10/23/2019
Created
11/08/2019
Added
11/06/2019
Modified
03/02/2020

Description

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).

Solution(s)

  • ubuntu-upgrade-haproxy

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