Executive Summary

Name CVE-2019-18277 First vendor Publication 2019-10-23
Vendor Cve Last vendor Modification 2022-06-02

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18277

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CPE : Common Platform Enumeration

Application 86

Sources (Detail)

Source Url
MISC https://git.haproxy.org/?p=haproxy-2.0.git;a=commit;h=196a7df44d8129d1adc795d...
MLIST https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
SUSE http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00016.html
UBUNTU https://usn.ubuntu.com/4174-1/

Alert History

If you want to see full details history, please login or register.
Date Informations
2022-06-02 21:27:29
  • Multiple Updates
2021-05-04 13:29:56
  • Multiple Updates
2021-04-22 02:44:11
  • Multiple Updates
2020-09-03 01:26:20
  • Multiple Updates
2020-05-23 02:26:55
  • First insertion