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Mageia: 2020-0083 Moderate: Python-Waitress HTTP Request Vulnerabilities

Updated python-waitress packages fix security vulnerabilities: If a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. . MGASA-2020-0083 - Updated python-waitress packages fix security vulnerabilities Publication date: 13 Feb 2020 URL: https://advisories.mageia.org/MGASA-2020-0083.html Type: security Affected Mageia releases: 7 CVE: CVE-2019-16785, CVE-2019-16786, CVE-2019-16789 Updated python-waitress packages fix security vulnerabilities: If a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. 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 (CVE-2019-16785). 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. This could allow for Waitress to treat a single request as multiple requests in the case of HTTP pipelining (CVE-2019-16786). In Waitress through version 1.4.0, if a proxy server is used in front of waitress, an invalid request may be sent by an attacker that bypasses the front-end and is parsed differently by waitress leading to a potential for HTTP request smuggling. 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-2019-16789). References: - https://bugs.mageia.org/show_bug.cgi?id=26014 - https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes - https://www.cve.org/CVERecord?id=CVE-2019-16785 - https://www.cve.org/CVERecord?id=CVE-2019-16786 -https://www.cve.org/CVERecord?id=CVE-2019-16789 SRPMS: - 7/core/python-waitress-1.4.2-1.mga7 . Enhanced python-waitress plugins resolve urgent vulnerabilities in server interpretation, improving defenses against possible intrusions.. python-waitress, security update, mageia, http server issues, attack mitigation. . LinuxSecurity.com Team

Feb 13, 2020 Mageia