UBUNTU-CVE-2019-16785

See a problem?
Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2019-16785
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16785.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2019-16785
Related
Published
2019-12-20T23:15:00Z
Modified
2019-12-20T23:15:00Z
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

Ubuntu:Pro:16.04:LTS / waitress

Package

Name
waitress

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.8.9-2ubuntu1
0.8.10-1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:18.04:LTS / waitress

Package

Name
waitress

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.1-1

Ecosystem specific 

{
    "ubuntu_priority": "low"
}

Ubuntu:20.04:LTS / waitress

Package

Name
waitress
Purl
pkg:deb/ubuntu/waitress@1.4.1-1?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.1-1

Affected versions

1.*

1.2.0~b2-2
1.3.1-4

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "python-waitress-doc": "1.4.1-1",
            "python3-waitress": "1.4.1-1"
        }
    ]
}