PT-2019-20154 · Waitress · Waitress
Published
2019-12-20
·
Updated
2019-12-20
None
No severity ratings or metrics are available. When they are, we'll update the corresponding info on the page.
Name of the Vulnerable Software and Affected Versions
Waitress versions prior to 1.4.0
Description
The issue arises from the incorrect parsing of the Transfer-Encoding header, which should be a comma-separated list with the inner-most encoding first, followed by any further transfer codings, ending with chunked. When a request is sent with a header like "Transfer-Encoding: gzip, chunked", it would be ignored, and the request would use the Content-Length header instead to determine the body size of the HTTP message. This could allow Waitress to treat a single request as multiple requests in the case of HTTP pipelining.
Recommendations
For versions prior to 1.4.0, update to Waitress 1.4.0 to resolve the issue.
Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Waitress