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CVE-2019-18277 Detail

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).


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00019.html
https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=196a7df44d8129d1adc795da020b722614d6a581
https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
https://nathandavison.com/blog/haproxy-http-request-smuggling Exploit  Third Party Advisory 
https://usn.ubuntu.com/4174-1/
https://www.mail-archive.com/haproxy%40formilux.org/msg34926.html

Weakness Enumeration

CWE-ID CWE Name Source
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-18277
NVD Published Date:
10/23/2019
NVD Last Modified:
11/06/2023
Source:
MITRE