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SUSE: CVE-2019-16786: SUSE Linux Security Advisory

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SUSE: CVE-2019-16786: SUSE Linux Security Advisory

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
12/20/2019
Created
11/14/2020
Added
11/12/2020
Modified
05/11/2021

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)

  • suse-upgrade-python2-waitress
  • suse-upgrade-python3-waitress

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