RHSA-2020:0720 - Security Advisory

Topic

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.

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.

Solution

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

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack for IBM Power 15 ppc64le
• Red Hat OpenStack 15 x86_64

Fixes

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

CVEs

• CVE-2019-16785
• CVE-2019-16786
• CVE-2019-16789

References

• https://access.redhat.com/security/updates/classification/#low