UBUNTU-CVE-2022-24761

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Source
https://ubuntu.com/security/CVE-2022-24761
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-24761.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2022-24761
Related
Published
2022-03-17T13:15:00Z
Modified
2022-03-17T13:15:00Z
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 is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's int() to parse strings into integers, leading to +10 to be parsed as 10, or 0x01 to be parsed as 1, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.

References

Affected packages

Ubuntu:20.04:LTS / waitress

Package

Name
waitress
Purl
pkg:deb/ubuntu/waitress?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.1-1ubuntu0.1

Affected versions

1.*

1.2.0~b2-2
1.3.1-4
1.4.1-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1.4.1-1ubuntu0.1",
            "binary_name": "python-waitress-doc"
        },
        {
            "binary_version": "1.4.1-1ubuntu0.1",
            "binary_name": "python3-waitress"
        }
    ]
}

Ubuntu:22.04:LTS / waitress

Package

Name
waitress
Purl
pkg:deb/ubuntu/waitress?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.4-1.1ubuntu1

Affected versions

1.*

1.4.4-1.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1.4.4-1.1ubuntu1",
            "binary_name": "python-waitress-doc"
        },
        {
            "binary_version": "1.4.4-1.1ubuntu1",
            "binary_name": "python3-waitress"
        }
    ]
}