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ubuntucveUbuntu.comUB:CVE-2021-21409
HistoryMar 30, 2021 - 12:00 a.m.

CVE-2021-21409

2021-03-3000:00:00
ubuntu.com
ubuntu.com
10

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.024 Low

EPSS

Percentile

89.8%

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnetty< 1:4.1.7-4ubuntu0.1+esm2UNKNOWN
ubuntu20.04noarchnetty< 1:4.1.45-1ubuntu0.1~esm1UNKNOWN
ubuntu22.04noarchnetty< 1:4.1.48-4+deb11u1build0.22.04.1UNKNOWN
ubuntu22.10noarchnetty< 1:4.1.48-5ubuntu0.1UNKNOWN
ubuntu23.10noarchnetty< anyUNKNOWN
ubuntu14.04noarchnetty< anyUNKNOWN
ubuntu16.04noarchnetty< 1:4.0.34-1ubuntu0.1~esm1UNKNOWN

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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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.024 Low

EPSS

Percentile

89.8%

JSON
Related for UB:CVE-2021-21409
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