CVE-2020-10108: Twisted Improper Input Validation Vulnerability
CRITICALCVE-2020-10108 is a CRITICAL (CVSS 9.8) improper input validation vulnerability (CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')) affecting Twisted libraries in the PyPI ecosystem. The issue involves improper input validation in twisted. Remediation is available by upgrading affected packages to version 20.3.0.
CVE-2020-10108 at a Glance
Security Impact
CVSS: 9.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2020-10108
To remediate this vulnerability, upgrade all affected Twisted dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install Twisted>=20.3.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show TwistedHow to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2020-10108, inspect your installed packages using pip:
pip show TwistedAnalyze the terminal output to locate any version of Twisted in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 20.3.0), your application is affected.
Note: The pip show Twisted command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'), where the product acts as an intermediary http agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed http requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. In Twisted, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2020-10108 Affected Twisted Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
Twisted
|
PyPI |
< 20.3.0
|
20.3.0
|
References
Frequently Asked Questions
What is CVE-2020-10108?
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What version fixes CVE-2020-10108?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-h96w-mmrf-2h6v",
"modified" : "2024-11-25T18:33:22Z",
"published" : "2020-03-31T15:42:42Z",
"aliases" : [ "CVE-2020-10108" ],
"summary" : "Improper Input Validation in Twisted",
"details" : "In Twisted Web before 20.3.0, there was an HTTP request splitting vulnerability. When presented with two content-length headers, it ignored the first header. When the second content-length value was set to zero, the request body was interpreted as a pipelined request.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "Twisted"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "20.3.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-10108"
}, {
"type" : "WEB",
"url" : "https://github.com/twisted/twisted/commit/4a7d22e490bb8ff836892cc99a1f54b85ccb0281"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2020-259.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/twisted/twisted"
}, {
"type" : "WEB",
"url" : "https://github.com/twisted/twisted/blob/6ff2c40e42416c83203422ff70dfc49d2681c8e2/NEWS.rst#twisted-2030-2020-03-13"
}, {
"type" : "WEB",
"url" : "https://know.bishopfox.com/advisories"
}, {
"type" : "WEB",
"url" : "https://know.bishopfox.com/advisories/twisted-version-19.10.0"
}, {
"type" : "WEB",
"url" : "https://lists.debian.org/debian-lts-announce/2022/02/msg00021.html"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL"
}, {
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}, {
"type" : "WEB",
"url" : "https://security.gentoo.org/glsa/202007-24"
}, {
"type" : "WEB",
"url" : "https://usn.ubuntu.com/4308-1"
}, {
"type" : "WEB",
"url" : "https://usn.ubuntu.com/4308-2"
}, {
"type" : "WEB",
"url" : "https://www.oracle.com/security-alerts/cpuoct2020.html"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20", "CWE-444" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2020-03-31T15:28:25Z",
"nvd_published_at" : "2020-03-12T13:15:00Z"
}
}