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CVE-2020-7238: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

February 21, 2020 (updated August 19, 2021)

Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.

References

  • access.redhat.com/errata/RHSA-2020:0497
  • access.redhat.com/errata/RHSA-2020:0567
  • access.redhat.com/errata/RHSA-2020:0601
  • access.redhat.com/errata/RHSA-2020:0605
  • access.redhat.com/errata/RHSA-2020:0606
  • access.redhat.com/errata/RHSA-2020:0804
  • access.redhat.com/errata/RHSA-2020:0805
  • access.redhat.com/errata/RHSA-2020:0806
  • access.redhat.com/errata/RHSA-2020:0811
  • github.com/advisories/GHSA-ff2w-cq2g-wv5f
  • github.com/jdordonezn/CVE-2020-72381/issues/1
  • github.com/netty/netty/issues/9861
  • github.com/netty/netty/pull/9865
  • lists.apache.org/thread.html/r131e572d003914843552fa45c4398b9903fb74144986e8b107c0a3a7@%3Ccommits.cassandra.apache.org%3E
  • lists.apache.org/thread.html/rc8d554aad889d12b140d9fd7d2d6fc2e8716e9792f6f4e4b2cdc2d05@%3Ccommits.cassandra.apache.org%3E
  • lists.debian.org/debian-lts-announce/2020/02/msg00017.html
  • lists.debian.org/debian-lts-announce/2020/02/msg00018.html
  • lists.debian.org/debian-lts-announce/2020/09/msg00003.html
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TS6VX7OMXPDJIU5LRGUAHRK6MENAVJ46/
  • netty.io/news/
  • nvd.nist.gov/vuln/detail/CVE-2020-7238
  • www.debian.org/security/2021/dsa-4885

Code Behaviors & Features

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Affected versions

All versions starting from 4.1.43 up to 4.1.44

Fixed versions

  • 4.1.45

Solution

Upgrade to version 4.1.45 or above.

Impact 7.5 HIGH

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

Learn more about CVSS

Weakness

  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
  • CWE-707: Improper Neutralization

Source file

maven/io.netty/netty-handler/CVE-2020-7238.yml

Spotted a mistake? Edit the file on GitLab.

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