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Alpine Linux: CVE-2019-16786: py-waitress Multiple vulnerabilities

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Alpine Linux: CVE-2019-16786: py-waitress Multiple vulnerabilities

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
12/20/2019
Created
03/26/2020
Added
03/24/2020
Modified
03/24/2020

Description

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.

Solution(s)

  • alpine-linux-upgrade-py-waitress

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