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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 issue is fixed in Waitress 1.4.0.", "An HTTP-request vulnerability was discovered in Waitress which implemented a \"MAY\" part of the RFC7230 which states: \"Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR.\" Unfortunately, if a front-end server does not process header fields with an LF the same way as it processes those with a CRLF, it can lead to the front-end and the back-end server processing the same HTTP message in two different ways. This vulnerability can lead to a potential for HTTP request smuggling and splitting where Waitress may see two requests, while the front-end server only sees a single HTTP message."], "name": "CVE-2019-16785", "package_state": [{"cpe": "cpe:/a:redhat:ceph_storage:3", "fix_state": "Affected", "impact": "low", "package_name": "python-waitress", "product_name": "Red Hat Ceph Storage 3"}, {"cpe": "cpe:/a:redhat:ceph_storage:4", "fix_state": "Affected", "impact": "low", "package_name": "python-waitress", "product_name": "Red Hat Ceph Storage 4"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Will not fix", "impact": "low", "package_name": "python-waitress", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:16", "fix_state": "Affected", "impact": "low", "package_name": "python-waitress", "product_name": "Red Hat OpenStack Platform 16 (Train)"}], "public_date": "2019-12-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-16785\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-16785\nhttps://docs.pylonsproject.org/projects/waitress/en/latest/#id6"], "statement": "All affected Red Hat products ship but do not use the flawed version of python-waitress. The impact for these products is therefore rated as having a security impact of Low.\nIn Red Hat OpenStack Platform 13,  because the flawed code is not used and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP13 python-waitress package.", "threat_severity": "Important"}