CVE-2019-16785

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Source
https://cve.org/CVERecord?id=CVE-2019-16785
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-16785.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2019-16785
Aliases
Downstream
Related
Published
2019-12-20T23:15:11.167Z
Modified
2026-03-19T03:20:08.135205Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/Pylons/waitress

Affected ranges

Type
GIT
Repo
https://github.com/Pylons/waitress
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
05e965e02f9d73fa6db18a120da1bebcfe429ca2
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.3.1"
        }
    ]
}
Type
GIT
Repo
https://github.com/pylons/waitress
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba

Affected versions

0.*
0.1
0.2
0.3
0.4
0.5
0.6
0.6.1
0.7
0.8
0.8.1
0.8.10
0.8.11b0
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
0.9.0b0
v0.*
v0.9.0
v0.9.0b1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0a1
v1.0a2
v1.1.0
v1.2.0
v1.2.0b1
v1.2.0b2
v1.2.0b3
v1.2.1
v1.3.0
v1.3.0b0
v1.3.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-16785.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "1.10.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "30"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "31"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "15"
            }
        ]
    }
]