Executive Summary

Informations
Name CVE-2019-16786 First vendor Publication 2019-12-20
Vendor Cve Last vendor Modification 2023-11-07

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:L/Au:N/C:N/I:P/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Waitress through version 1.3.1 would parse the Transfer-Encoding header and only look for a single string value, if that value was not chunked it would fall through and use the Content-Length header instead. According to the HTTP standard Transfer-Encoding should be a comma separated list, with the inner-most encoding first, followed by any further transfer codings, ending with chunked. Requests sent with: "Transfer-Encoding: gzip, chunked" would incorrectly get ignored, and the request would use a Content-Length header instead to determine the body size of the HTTP message. This could allow for Waitress to treat a single request as multiple requests in the case of HTTP pipelining. This issue is fixed in Waitress 1.4.0.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16786

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Os 1
Os 2

Sources (Detail)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
Source Url
CONFIRM https://github.com/Pylons/waitress/security/advisories/GHSA-g2xc-35jw-c63p
MISC https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes
https://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7...
https://www.oracle.com/security-alerts/cpuapr2022.html
MLIST https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html
REDHAT https://access.redhat.com/errata/RHSA-2020:0720

Alert History

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Date Informations
2023-11-07 21:38:15
  • Multiple Updates
2022-09-24 02:10:59
  • Multiple Updates
2022-05-13 09:23:22
  • Multiple Updates
2022-04-20 09:23:35
  • Multiple Updates
2021-05-04 13:31:09
  • Multiple Updates
2021-04-22 02:45:32
  • Multiple Updates
2020-05-23 02:26:14
  • First insertion