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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2019-12-20T23:00:20
Updated: 2024-08-05T01:24:48.017Z
Reserved: 2019-09-24T00:00:00
Link: CVE-2019-16786
Vulnrichment
No data.
NVD
Status : Modified
Published: 2019-12-20T23:15:11.277
Modified: 2024-11-21T04:31:11.360
Link: CVE-2019-16786
Redhat