CVE-2019-16786
HTTP Request Smuggling: Invalid Transfer-Encoding in Waitress
描述
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.
如何修補 CVE-2019-16786
要修補 CVE-2019-16786,請將受影響套件升級到下列已修補版本。
- —升級至 1.4.0 或更新版本
CVE-2019-16786 正在被利用嗎?
低 — EPSS 為 2.5%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.4.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N |
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N |