CVE-2019-16785
published 2019-12-20CVE-2019-16785: 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…
high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
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.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| agendaless | waitress | <= 1.3.1 | — |
| debian | debian_linux | — | — |
| debian | waitress | < waitress 1.4.1-1 (bookworm) | waitress 1.4.1-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| oracle | communications_cloud_native_core_network_function_cloud_native_environment | — | — |
| pylons | waitress | <= 1.3.1 | — |
| pylons | waitress | >= 0 < 1.4.1-1 | 1.4.1-1 |
| pylons | waitress | >= 0 < 1.4.1-1 | 1.4.1-1 |
| pylons | waitress | >= 0 < 1.4.1-1 | 1.4.1-1 |
| pylons | waitress | >= 0 < 1.4.1-1 | 1.4.1-1 |
| pylons | waitress | >= 0 < 1.4.0 | 1.4.0 |
| redhat | openstack | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
osv7.5HIGH