Executive Summary

Title python-waitress security update
Name RHSA-2020:0720 First vendor Publication 2020-03-05
Vendor RedHat Last vendor Modification 2020-03-05
Severity (Vendor) N/A Revision 01

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Overall CVSS Score 8.2
Base Score 8.2 Environmental Score 8.2
impact SubScore 4.2 Temporal Score 8.2
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact Low
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:P/I:P/A:N)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Problem Description:

An update for python-waitress is now available for Red Hat OpenStack Platform 15 (Stein).

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat OpenStack Platform 15.0 - noarch

3. Description:

Waitress is a pure Python WSGI server which supports HTTP/1.0 and HTTP/1.1.

Security Fix(es):

* HTTP request smuggling through LF vs CRLF handling (CVE-2019-16785)

* HTTP request smuggling through invalid Transfer-Encoding (CVE-2019-16786)

* HTTP Request Smuggling through Invalid whitespace characters in headers (CVE-2019-16789)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:


5. Bugs fixed (https://bugzilla.redhat.com/):

1789807 - CVE-2019-16789 waitress: HTTP Request Smuggling through Invalid whitespace characters in headers 1791415 - CVE-2019-16786 waitress: HTTP request smuggling through invalid Transfer-Encoding 1791420 - CVE-2019-16785 waitress: HTTP request smuggling through LF vs CRLF handling

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2020-0720.html

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

Application 1

Alert History

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Date Informations
2020-05-23 13:03:45
  • Multiple Updates
2020-03-19 13:20:04
  • First insertion