VDB
CVE-2019-16785
CVE-2019-16785
PUBLISHED
Waitress through version 1.3.1 implemented a "MAY" part of the RFC7230 which states: "Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR." Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0.
EPSS 1.02% · 77.5th percentile
Risk Scores
EPSS Score
1.02%
77.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | waitress | 0, 0.8.9-2ubuntu1, 0.8.10-1 |
| Ubuntu:18.04:LTS | waitress | 0, 1.0.1-1 |
Timeline
- Dec 20, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 22, 2021 EPSS Score
- Oct 25, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 2, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Jan 7, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-16785 third-party-advisory
- https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes third-party-advisory
- https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-16785 third-party-advisory