{"containers":{"cna":{"affected":[{"product":"Waitress","vendor":"Pylons","versions":[{"lessThanOrEqual":"1.3.1","status":"affected","version":"<= 1.3.1","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"Waitress through version 1.3.1 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 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. This issue is fixed in Waitress 1.4.0."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2022-05-12T23:06:13.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"FEDORA-2020-bdcc8ffc24","tags":["vendor-advisory","x_refsource_FEDORA"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/"},{"name":"FEDORA-2020-65a7744e38","tags":["vendor-advisory","x_refsource_FEDORA"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/"},{"name":"RHSA-2020:0720","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2020:0720"},{"tags":["x_refsource_MISC"],"url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"tags":["x_refsource_MISC"],"url":"https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"},{"tags":["x_refsource_CONFIRM"],"url":"https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p"},{"tags":["x_refsource_MISC"],"url":"https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba"},{"name":"[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update","tags":["mailing-list","x_refsource_MLIST"],"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"}],"source":{"advisory":"GHSA-pg36-wpm5-g57p","discovery":"UNKNOWN"},"title":"HTTP Request Smuggling: LF vs CRLF handling in Waitress","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2019-16785","STATE":"PUBLIC","TITLE":"HTTP Request Smuggling: LF vs CRLF handling in Waitress"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Waitress","version":{"version_data":[{"version_affected":"<=","version_name":"<= 1.3.1","version_value":"1.3.1"}]}}]},"vendor_name":"Pylons"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Waitress through version 1.3.1 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 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. This issue is fixed in Waitress 1.4.0."}]},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')"}]}]},"references":{"reference_data":[{"name":"FEDORA-2020-bdcc8ffc24","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/"},{"name":"FEDORA-2020-65a7744e38","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/"},{"name":"RHSA-2020:0720","refsource":"REDHAT","url":"https://access.redhat.com/errata/RHSA-2020:0720"},{"name":"https://www.oracle.com/security-alerts/cpuapr2022.html","refsource":"MISC","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"name":"https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes","refsource":"MISC","url":"https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"},{"name":"https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p","refsource":"CONFIRM","url":"https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p"},{"name":"https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba","refsource":"MISC","url":"https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba"},{"name":"[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"}]},"source":{"advisory":"GHSA-pg36-wpm5-g57p","discovery":"UNKNOWN"}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-05T01:24:47.876Z"},"title":"CVE Program Container","references":[{"name":"FEDORA-2020-bdcc8ffc24","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/"},{"name":"FEDORA-2020-65a7744e38","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/"},{"name":"RHSA-2020:0720","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"],"url":"https://access.redhat.com/errata/RHSA-2020:0720"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba"},{"name":"[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update","tags":["mailing-list","x_refsource_MLIST","x_transferred"],"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"}]}]},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2019-16785","datePublished":"2019-12-20T23:00:25.000Z","dateReserved":"2019-09-24T00:00:00.000Z","dateUpdated":"2024-08-05T01:24:47.876Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}