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.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: GitHub_M

Published: 2019-12-20T23:00:20

Updated: 2022-05-12T23:06:10

Reserved: 2019-09-24T00:00:00


Link: CVE-2019-16786

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2019-12-20T23:15:11.277

Modified: 2023-11-07T03:05:44.287


Link: CVE-2019-16786

JSON object: View

cve-icon Redhat Information

No data.

CWE