-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Format: 1.8 Date: Wed, 11 May 2022 22:42:07 -0400 Source: waitress Architecture: source Version: 1.2.0~b2-2+deb10u1 Distribution: buster-security Urgency: high Maintainer: Andrej Shadura <andrewsh@debian.org> Changed-By: Stefano Rivera <stefanor@debian.org> Closes: 1008013 Changes: waitress (1.2.0~b2-2+deb10u1) buster-security; urgency=high . * Non-maintainer upload by the Security Team. * Security updates to fix request smuggling bugs, when combined with another http proxy that interprets requests differently. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This can result in cache poisoning or unexpected information disclosure. The specific issues resolved are: - CVE-2019-16785: Only recognise CRLF as a line-terminator, not a plain LF. Before this change waitress could see two requests where the front-end proxy only saw one. - CVE-2019-16786: Waitress 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. This could allow for Waitress to treat a single request as multiple requests in the case of HTTP pipelining. - CVE-2019-16789: Specially crafted requests containing special whitespace characters in 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 unexpected information disclosure. - CVE-2019-16792: If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. - CVE-2022-24761: There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: + The use of Python's int() to parse strings into integers, leading to +10 to be parsed as 10, or 0x01 to be parsed as 1, where as the standard specifies that the string should contain only digits or hex digits. + Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. (Closes: #1008013) Checksums-Sha1: 8dd87511156296e7408da902d6b31085a929da34 1643 waitress_1.2.0~b2-2+deb10u1.dsc 100e289d1b0048cd91c9ac4cf31667d59d8bbbb4 156556 waitress_1.2.0~b2.orig.tar.gz 3fd4378c31c8ecc5b41f2e477f4502f311c9a72d 22276 waitress_1.2.0~b2-2+deb10u1.debian.tar.xz 11ebe5330963236a2bf45521d38e6e6f2cdd61b5 7400 waitress_1.2.0~b2-2+deb10u1_source.buildinfo Checksums-Sha256: 539e80539e1cc4f6518edca82851e8e66a400a8513b24ef448a09f0cb064f7a3 1643 waitress_1.2.0~b2-2+deb10u1.dsc cdd45fc341b4972ec9f51cf3477f41fc84832bcedc9467a4e6a35d35fdf3e245 156556 waitress_1.2.0~b2.orig.tar.gz fd474f3d5bc77b1b882f3137a73a090d0f0894a1c8714101124303c0cb2ecf26 22276 waitress_1.2.0~b2-2+deb10u1.debian.tar.xz eded290fa3dd43a83527c6b8cbd1738bca07e3dbf9476be42cc93c4824590dc7 7400 waitress_1.2.0~b2-2+deb10u1_source.buildinfo Files: c4f3813bb1b6215738b486a4080d4cda 1643 python optional waitress_1.2.0~b2-2+deb10u1.dsc db9f9a12cf177fd3a6419205a0202f4d 156556 python optional waitress_1.2.0~b2.orig.tar.gz f1441c82cfed78a2c3c4c1abde9951d7 22276 python optional waitress_1.2.0~b2-2+deb10u1.debian.tar.xz ad7de420a58af500a2f5edd563f46371 7400 python optional waitress_1.2.0~b2-2+deb10u1_source.buildinfo -----BEGIN PGP SIGNATURE----- iIoEARYKADIWIQTumtb5BSD6EfafSCRHew2wJjpU2AUCYn7H+BQcc3RlZmFub3JA ZGViaWFuLm9yZwAKCRBHew2wJjpU2HDkAP9n2x4AaqJ6AzBai299e61Heg9H31nZ +iyo3WeLVgLjOgD+JRKbybt+5dOj4tu7X42G6/tyYb5UfRErQln9qc7klws= =s5dj -----END PGP SIGNATURE-----
