GHSA-F256-J965-7F32
Vulnerability from github – Published: 2021-03-30 15:10 – Updated: 2022-02-08 21:31
VLAI
Summary
Possible request smuggling in HTTP/2 due missing validation of content-length
Details
Impact
The content-length header is not correctly validated if the request only use a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1
This is a followup of https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj which did miss to fix this one case.
Patches
This was fixed as part of 4.1.61.Final
Workarounds
Validation can be done by the user before proxy the request by validating the header.
Severity
5.9 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.61.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c 4.0.0"
},
"package": {
"ecosystem": "Maven",
"name": "org.jboss.netty:netty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c 4.0.0"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-21409"
],
"database_specific": {
"cwe_ids": [
"CWE-444"
],
"github_reviewed": true,
"github_reviewed_at": "2021-03-30T15:03:26Z",
"nvd_published_at": "2021-03-30T15:15:00Z",
"severity": "MODERATE"
},
"details": "### Impact\nThe content-length header is not correctly validated if the request only use a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1\n\nThis is a followup of https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj which did miss to fix this one case. \n\n### Patches\nThis was fixed as part of 4.1.61.Final\n\n### Workarounds\nValidation can be done by the user before proxy the request by validating the header.",
"id": "GHSA-f256-j965-7f32",
"modified": "2022-02-08T21:31:25Z",
"published": "2021-03-30T15:10:38Z",
"references": [
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"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32"
},
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"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj"
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"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21409"
},
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"url": "https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432"
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"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
},
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"url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295"
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"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Possible request smuggling in HTTP/2 due missing validation of content-length"
}
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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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