Description
Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.
References (146)
Core 146
Core References
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Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2019/09/msg00035.html
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Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2019:3892
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Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2019:3901
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Third Party Advisory vendor-advisory
https://www.debian.org/security/2020/dsa-4597
Issue Tracking, Mailing List, Third Party Advisory mailing-list
https://seclists.org/bugtraq/2020/Jan/6
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2020:0164
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2020:0159
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2020:0160
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2020:0161
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Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2020:0445
Mailing List mailing-list
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Mailing List, Third Party Advisory mailing-list
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Mailing List mailing-list
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Mailing List mailing-list
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Mailing List mailing-list
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Mailing List mailing-list
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Mailing List mailing-list
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Various Sources
https://github.com/poc-effectiveness/PoCAdaptation/tree/main/Adapted/CVE-2019-16869/5.0.0.Alpha1/exploit
Patch, Third Party Advisory
https://github.com/netty/netty/compare/netty-4.1.41.Final...netty-4.1.42.Final
Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/netty/netty/issues/9571
Third Party Advisory vendor-advisory
https://usn.ubuntu.com/4532-1/
Scores
CVSS v3
7.5
EPSS
0.0842
EPSS Percentile
94.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-444
Status
published
Products (10)
canonical/ubuntu_linux
18.04
debian/debian_linux
8.0
debian/debian_linux
9.0
debian/debian_linux
10.0
io.netty/netty-all
4.0.0.Alpha1 - 4.1.42.FinalMaven
netty/netty
< 4.1.42
org.jboss.netty/netty
0Maven
redhat/jboss_enterprise_application_platform
7.2
redhat/jboss_enterprise_application_platform
7.3
redhat/jboss_enterprise_application_platform
7.4
Published
Sep 26, 2019
Tracked Since
Feb 18, 2026