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44 lines
1.7 KiB
44 lines
1.7 KiB
5 months ago
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From 6e0af1e0e01f7c9a9a83431b99a82b0de5c6a5da Mon Sep 17 00:00:00 2001
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From: Carl George <carlwgeorge@gmail.com>
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Date: Tue, 25 Jun 2024 22:40:57 -0500
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Subject: [PATCH 7/8] Backport security fix note
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---
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CHANGES.txt | 23 +++++++++++++++++++++++
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1 file changed, 23 insertions(+)
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diff --git a/CHANGES.txt b/CHANGES.txt
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index 701c2b0..f9d4c42 100644
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--- a/CHANGES.txt
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+++ b/CHANGES.txt
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@@ -1,3 +1,26 @@
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+Security Bugfix
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+~~~~~~~~~~~~~~~
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+
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+- Waitress now validates that chunked encoding extensions are valid, and don't
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+ contain invalid characters that are not allowed. They are still skipped/not
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+ processed, but if they contain invalid data we no longer continue in and
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+ return a 400 Bad Request. This stops potential HTTP desync/HTTP request
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+ smuggling. Thanks to Zhang Zeyu for reporting this issue. See
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+ https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36
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+
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+- Waitress now validates that the chunk length is only valid hex digits when
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+ parsing chunked encoding, and values such as ``0x01`` and ``+01`` are no
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+ longer supported. This stops potential HTTP desync/HTTP request smuggling.
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+ Thanks to Zhang Zeyu for reporting this issue. See
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+ https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36
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+
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+- Waitress now validates that the Content-Length sent by a remote contains only
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+ digits in accordance with RFC7230 and will return a 400 Bad Request when the
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+ Content-Length header contains invalid data, such as ``+10`` which would
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+ previously get parsed as ``10`` and accepted. This stops potential HTTP
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+ desync/HTTP request smuggling Thanks to Zhang Zeyu for reporting this issue. See
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+ https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36
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+
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1.4.3 (2020-02-02)
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------------------
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--
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2.45.2
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