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).
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-10-23T13:07:01

Updated: 2024-08-05T01:47:14.151Z

Reserved: 2019-10-23T00:00:00

Link: CVE-2019-18277

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-10-23T14:15:10.557

Modified: 2024-11-21T04:32:57.377

Link: CVE-2019-18277

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-09-13T00:00:00Z

Links: CVE-2019-18277 - Bugzilla