Debian: DLA-2056-1 Critical: Waitress HTTP Request Smuggling Issue

Specially crafted requests containing special whitespace charactersin the Transfer-Encoding header would get parsed by Waitress as being
a chunked request, but a front-end server would use the
Content-Length instead as the Transfer-Encoding header is considered
invalid due to containing invalid characters. If a front-end server
does HTTP pipelining to a backend Waitress server this could lead to
HTTP request splitting which may lead to potential cache poisoning or
information disclosure.

For Debian 8 "Jessie", this issue has been fixed in waitress version
0.8.9-2+deb8u1.

We recommend that you upgrade your waitress packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Regards,

- --
,'`.
: :' : Chris Lamb
`. `'` lamby@debian.org / chris-lamb.co.uk
`-