GHSA-qppv-j76h-2rpx

Source

https://github.com/advisories/GHSA-qppv-j76h-2rpx

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/08/GHSA-qppv-j76h-2rpx/GHSA-qppv-j76h-2rpx.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-qppv-j76h-2rpx

Published

2023-08-14T21:34:17Z

Modified

2024-11-28T05:40:58.798097Z

Summary

Tornado vulnerable to HTTP request smuggling via improper parsing of `Content-Length` fields and chunk lengths

Details

Summary

Tornado interprets -, +, and _ in chunk length and Content-Length values, which are not allowed by the HTTP RFCs. This can result in request smuggling when Tornado is deployed behind certain proxies that interpret those non-standard characters differently. This is known to apply to older versions of haproxy, although the current release is not affected.

Details

Tornado uses the int constructor to parse the values of Content-Length headers and chunk lengths in the following locations:

`tornado/http1connection.py:445`

            self._expected_content_remaining = int(headers["Content-Length"])

`tornado/http1connection.py:621`

                content_length = int(headers["Content-Length"])  # type: Optional[int]

`tornado/http1connection.py:671`

            chunk_len = int(chunk_len_str.strip(), 16)

Because int("0_0") == int("+0") == int("-0") == int("0"), using the int constructor to parse and validate strings that should contain only ASCII digits is not a good strategy.

Database specific

{
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-444"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2023-08-14T21:34:17Z"
}

References

Affected packages

PyPI / tornado

Package

Name: tornado; View open source insights on deps.dev
Purl: pkg:pypi/tornado

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.3.3

Affected versions

0.*

0.2

1.*

1.0

1.1

1.1.1

1.2

1.2.1

2.*

2.0

2.1

2.1.1

2.2

2.2.1

2.3

2.4

2.4.1

3.*

3.0

3.0.1

3.0.2

3.1

3.1.1

3.2

3.2.1

3.2.2

4.*

4.0

4.0.1

4.0.2

4.1b2

4.1

4.2b1

4.2

4.2.1

4.3b1

4.3b2

4.3

4.4b1

4.4

4.4.1

4.4.2

4.4.3

4.5b1

4.5b2

4.5

4.5.1

4.5.2

4.5.3

5.*

5.0a1

5.0b1

5.0

5.0.1

5.0.2

5.1b1

5.1

5.1.1

6.*

6.0a1

6.0b1

6.0

6.0.1

6.0.2

6.0.3

6.0.4

6.1b1

6.1b2

6.1

6.2b1

6.2b2

6.2

6.3b1

6.3

6.3.1

6.3.2