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cvelistGitHub_MCVELIST:CVE-2021-21409
HistoryMar 30, 2021 - 3:05 p.m.

CVE-2021-21409 Possible request smuggling in HTTP/2 due missing validation of content-length

2021-03-3015:05:17
CWE-444
GitHub_M
www.cve.org
2

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

6.8 Medium

AI Score

Confidence

High

0.186 Low

EPSS

Percentile

96.3%

JSON

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses 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 GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

CNA Affected

[
  {
    "product": "netty",
    "vendor": "netty",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.1.61.Final"
      }
    ]
  }
]

References

Related

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Security Bulletin: IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in Netty
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5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

6.8 Medium

AI Score

Confidence

High

0.186 Low

EPSS

Percentile

96.3%

JSON
Related for CVELIST:CVE-2021-21409
nvd3cve3ibm25osv9nessus20prion3debiancve2ubuntucve2mageia1veracode2redos1openvas6redhat31github2suse3cvelist2f51redhatcve3debian1ubuntu1photon5rocky1oracle6