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PYSEC-2022-195
Vulnerability from pysec - Published: 2022-04-04 18:15 - Updated: 2022-05-17 23:28
VLAI
Details
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.
Impacted products
| Name | purl | twisted | pkg:pypi/twisted |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "twisted",
"purl": "pkg:pypi/twisted"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "592217e951363d60e9cd99c5bbfd23d4615043ac"
}
],
"repo": "https://github.com/twisted/twisted",
"type": "GIT"
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "22.4.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.1",
"1.0.3",
"1.0.4",
"1.0.5",
"1.0.6",
"1.0.7",
"1.1.0",
"1.1.1",
"1.2.0",
"10.0.0",
"10.1.0",
"10.2.0",
"11.0.0",
"11.1.0",
"12.0.0",
"12.1.0",
"12.2.0",
"12.3.0",
"13.0.0",
"13.1.0",
"13.2.0",
"14.0.0",
"14.0.1",
"14.0.2",
"15.0.0",
"15.1.0",
"15.2.0",
"15.2.1",
"15.3.0",
"15.4.0",
"15.5.0",
"16.0.0",
"16.1.0",
"16.1.1",
"16.2.0",
"16.3.0",
"16.3.1",
"16.3.2",
"16.4.0",
"16.4.1",
"16.5.0",
"16.5.0rc1",
"16.5.0rc2",
"16.6.0",
"16.6.0rc1",
"16.7.0rc1",
"16.7.0rc2",
"17.1.0",
"17.1.0rc1",
"17.5.0",
"17.9.0",
"17.9.0rc1",
"18.4.0",
"18.4.0rc1",
"18.7.0",
"18.7.0rc1",
"18.7.0rc2",
"18.9.0",
"18.9.0rc1",
"19.10.0",
"19.10.0rc1",
"19.2.0",
"19.2.0rc1",
"19.2.0rc2",
"19.2.1",
"19.7.0",
"19.7.0rc1",
"2.1.0",
"2.4.0",
"2.5.0",
"20.3.0",
"20.3.0rc1",
"21.2.0",
"21.2.0rc1",
"21.7.0",
"21.7.0rc1",
"21.7.0rc2",
"21.7.0rc3",
"22.1.0",
"22.1.0rc1",
"22.2.0",
"22.2.0rc1",
"22.4.0rc1",
"8.0.0",
"8.0.1",
"8.1.0",
"8.2.0",
"9.0.0"
]
}
],
"aliases": [
"CVE-2022-24801",
"GHSA-c2jg-hw38-jrqq"
],
"details": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web\u0027s HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.",
"id": "PYSEC-2022-195",
"modified": "2022-05-17T23:28:35.399117Z",
"published": "2022-04-04T18:15:00Z",
"references": [
{
"type": "FIX",
"url": "https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1"
},
{
"type": "ADVISORY",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html"
}
]
}
BREW-ALOT-CVE-2022-24801 (GHSA-C2JG-HW38-JRQQ)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-09 23:40 – Source website
VLAI
Summary
Inconsistent Interpretation of HTTP Requests in twisted.web
Details
The Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:
- The Content-Length header value could have a
+or-prefix. - Illegal characters were permitted in chunked extensions, such as the LF (
\n) character. - Chunk lengths, which are expressed in hexadecimal format, could have a prefix of
0x. - HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (
\t).
This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.
Impact
You may be affected if:
- You use Twisted Web's HTTP 1.1 server and/or proxy
- You also pass requests through a different HTTP server and/or proxy
The specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.
The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.
Patches
The issue has been addressed in Twisted 22.4.0rc1 and later.
Workarounds
Other than upgrading Twisted, you could:
- Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them
- Filter malformed requests by other means, such as configuration of an upstream proxy
Credits
This issue was initially reported by Zhang Zeyu.
Severity
8.1 (High)
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "twisted",
"resource_purl": "pkg:pypi/twisted@26.4.0",
"upstream_fixed_in": "22.4.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "alot",
"purl": "pkg:brew/alot"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.12_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/twisted@26.4.0",
"name": "twisted",
"resource": "twisted",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "The Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:\n\n1. The Content-Length header value could have a `+` or `-` prefix.\n2. Illegal characters were permitted in chunked extensions, such as the LF (`\\n`) character.\n3. Chunk lengths, which are expressed in hexadecimal format, could have a prefix of `0x`.\n4. HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (`\\t`).\n\nThis non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.\n\n### Impact\n\nYou may be affected if:\n\n1. You use Twisted Web\u0027s HTTP 1.1 server and/or proxy\n2. You also pass requests through a different HTTP server and/or proxy\n\nThe specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.\n\nThe Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.\n\n### Patches\n\nThe issue has been addressed in Twisted 22.4.0rc1 and later.\n\n### Workarounds\n\nOther than upgrading Twisted, you could:\n\n* Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them\n* Filter malformed requests by other means, such as configuration of an upstream proxy\n\n### Credits\n\nThis issue was initially reported by [Zhang Zeyu](https://github.com/zeyu2001).",
"id": "BREW-alot-CVE-2022-24801",
"modified": "2026-09-09T23:40:58Z",
"published": "2026-08-13T16:35:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24801"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2022-195.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/twisted/twisted"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Inconsistent Interpretation of HTTP Requests in twisted.web",
"upstream": [
"GHSA-c2jg-hw38-jrqq",
"CVE-2022-24801",
"PYSEC-2022-195"
]
}
BREW-MAGIC-WORMHOLE-CVE-… (GHSA-C2JG-HW38-JRQQ)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:10 – Updated: 2026-09-17 18:05 – Source website
VLAI
Summary
Inconsistent Interpretation of HTTP Requests in twisted.web
Details
The Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:
- The Content-Length header value could have a
+or-prefix. - Illegal characters were permitted in chunked extensions, such as the LF (
\n) character. - Chunk lengths, which are expressed in hexadecimal format, could have a prefix of
0x. - HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (
\t).
This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.
Impact
You may be affected if:
- You use Twisted Web's HTTP 1.1 server and/or proxy
- You also pass requests through a different HTTP server and/or proxy
The specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.
The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.
Patches
The issue has been addressed in Twisted 22.4.0rc1 and later.
Workarounds
Other than upgrading Twisted, you could:
- Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them
- Filter malformed requests by other means, such as configuration of an upstream proxy
Credits
This issue was initially reported by Zhang Zeyu.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "twisted",
"resource_purl": "pkg:pypi/twisted@26.4.0",
"upstream_fixed_in": "22.4.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "magic-wormhole",
"purl": "pkg:brew/magic-wormhole"
},
"ranges": [
{
"events": [
{
"introduced": "0.9.2"
},
{
"fixed": "0.12.0_6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/twisted@26.4.0",
"name": "twisted",
"resource": "twisted",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "The Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:\n\n1. The Content-Length header value could have a `+` or `-` prefix.\n2. Illegal characters were permitted in chunked extensions, such as the LF (`\\n`) character.\n3. Chunk lengths, which are expressed in hexadecimal format, could have a prefix of `0x`.\n4. HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (`\\t`).\n\nThis non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.\n\n### Impact\n\nYou may be affected if:\n\n1. You use Twisted Web\u0027s HTTP 1.1 server and/or proxy\n2. You also pass requests through a different HTTP server and/or proxy\n\nThe specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.\n\nThe Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.\n\n### Patches\n\nThe issue has been addressed in Twisted 22.4.0rc1 and later.\n\n### Workarounds\n\nOther than upgrading Twisted, you could:\n\n* Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them\n* Filter malformed requests by other means, such as configuration of an upstream proxy\n\n### Credits\n\nThis issue was initially reported by [Zhang Zeyu](https://github.com/zeyu2001).",
"id": "BREW-magic-wormhole-CVE-2022-24801",
"modified": "2026-09-17T18:05:33Z",
"published": "2026-08-13T17:10:52Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24801"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2022-195.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/twisted/twisted"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Inconsistent Interpretation of HTTP Requests in twisted.web",
"upstream": [
"GHSA-c2jg-hw38-jrqq",
"CVE-2022-24801",
"PYSEC-2022-195"
]
}
BREW-SCRAPY-CVE-2022-24801 (GHSA-C2JG-HW38-JRQQ)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:34 – Updated: 2026-09-10 01:11 – Source website
VLAI
Summary
Inconsistent Interpretation of HTTP Requests in twisted.web
Details
The Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:
- The Content-Length header value could have a
+or-prefix. - Illegal characters were permitted in chunked extensions, such as the LF (
\n) character. - Chunk lengths, which are expressed in hexadecimal format, could have a prefix of
0x. - HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (
\t).
This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.
Impact
You may be affected if:
- You use Twisted Web's HTTP 1.1 server and/or proxy
- You also pass requests through a different HTTP server and/or proxy
The specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.
The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.
Patches
The issue has been addressed in Twisted 22.4.0rc1 and later.
Workarounds
Other than upgrading Twisted, you could:
- Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them
- Filter malformed requests by other means, such as configuration of an upstream proxy
Credits
This issue was initially reported by Zhang Zeyu.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "twisted",
"resource_purl": "pkg:pypi/twisted@26.4.0",
"upstream_fixed_in": "22.4.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "scrapy",
"purl": "pkg:brew/scrapy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.17.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/twisted@26.4.0",
"name": "twisted",
"resource": "twisted",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "The Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:\n\n1. The Content-Length header value could have a `+` or `-` prefix.\n2. Illegal characters were permitted in chunked extensions, such as the LF (`\\n`) character.\n3. Chunk lengths, which are expressed in hexadecimal format, could have a prefix of `0x`.\n4. HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (`\\t`).\n\nThis non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.\n\n### Impact\n\nYou may be affected if:\n\n1. You use Twisted Web\u0027s HTTP 1.1 server and/or proxy\n2. You also pass requests through a different HTTP server and/or proxy\n\nThe specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.\n\nThe Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.\n\n### Patches\n\nThe issue has been addressed in Twisted 22.4.0rc1 and later.\n\n### Workarounds\n\nOther than upgrading Twisted, you could:\n\n* Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them\n* Filter malformed requests by other means, such as configuration of an upstream proxy\n\n### Credits\n\nThis issue was initially reported by [Zhang Zeyu](https://github.com/zeyu2001).",
"id": "BREW-scrapy-CVE-2022-24801",
"modified": "2026-09-10T01:11:46Z",
"published": "2026-08-13T17:34:19Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24801"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2022-195.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/twisted/twisted"
},
{
"type": "WEB",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K"
},
{
"type": "WEB",
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CVE-2022-24801 (GCVE-0-2022-24801)
Vulnerability from cvelistv5 – Published: 2022-04-04 17:25 – Updated: 2025-04-23 18:42
VLAI
EPSS
VEX
Title
HTTP Request Smuggling in twisted.web
Summary
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:54 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Assigner
References
7 references
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|---|---|
| https://github.com/twisted/twisted/security/advis… | x_refsource_CONFIRM |
| https://github.com/twisted/twisted/commit/592217e… | x_refsource_MISC |
| https://github.com/twisted/twisted/releases/tag/t… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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GHSA-C2JG-HW38-JRQQ
Vulnerability from github – Published: 2022-04-04 21:29 – Updated: 2024-11-25 18:33
VLAI
Summary
Inconsistent Interpretation of HTTP Requests in twisted.web
Details
The Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:
- The Content-Length header value could have a
+or-prefix. - Illegal characters were permitted in chunked extensions, such as the LF (
\n) character. - Chunk lengths, which are expressed in hexadecimal format, could have a prefix of
0x. - HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (
\t).
This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.
Impact
You may be affected if:
- You use Twisted Web's HTTP 1.1 server and/or proxy
- You also pass requests through a different HTTP server and/or proxy
The specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.
The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.
Patches
The issue has been addressed in Twisted 22.4.0rc1 and later.
Workarounds
Other than upgrading Twisted, you could:
- Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them
- Filter malformed requests by other means, such as configuration of an upstream proxy
Credits
This issue was initially reported by Zhang Zeyu.
Severity
8.1 (High)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "Twisted"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "22.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-24801"
],
"database_specific": {
"cwe_ids": [
"CWE-444"
],
"github_reviewed": true,
"github_reviewed_at": "2022-04-04T21:29:41Z",
"nvd_published_at": "2022-04-04T18:15:00Z",
"severity": "CRITICAL"
},
"details": "The Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230:\n\n1. The Content-Length header value could have a `+` or `-` prefix.\n2. Illegal characters were permitted in chunked extensions, such as the LF (`\\n`) character.\n3. Chunk lengths, which are expressed in hexadecimal format, could have a prefix of `0x`.\n4. HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (`\\t`).\n\nThis non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.\n\n### Impact\n\nYou may be affected if:\n\n1. You use Twisted Web\u0027s HTTP 1.1 server and/or proxy\n2. You also pass requests through a different HTTP server and/or proxy\n\nThe specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control.\n\nThe Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected.\n\n### Patches\n\nThe issue has been addressed in Twisted 22.4.0rc1 and later.\n\n### Workarounds\n\nOther than upgrading Twisted, you could:\n\n* Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them\n* Filter malformed requests by other means, such as configuration of an upstream proxy\n\n### Credits\n\nThis issue was initially reported by [Zhang Zeyu](https://github.com/zeyu2001).",
"id": "GHSA-c2jg-hw38-jrqq",
"modified": "2024-11-25T18:33:24Z",
"published": "2022-04-04T21:29:41Z",
"references": [
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"url": "https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq"
},
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24801"
},
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"url": "https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac"
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{
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"type": "CVSS_V4"
}
],
"summary": "Inconsistent Interpretation of HTTP Requests in twisted.web"
}
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Trend slope:
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Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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