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Test ID:
Category:Debian Local Security Checks
Title:Debian LTS: Security Advisory for netty (DLA-2364-1)
Summary:The remote host is missing an update for the 'netty'; package(s) announced via the DLA-2364-1 advisory.
The remote host is missing an update for the 'netty'
package(s) announced via the DLA-2364-1 advisory.

Vulnerability Insight:
Several vulnerabilities have been discovered in netty, a Java NIO
client/server socket framework.

CVE-2019-20444 in Netty before 4.1.44 allows an HTTP header
that lacks a colon, which might be interpreted as a separate header
with an incorrect syntax, or might be interpreted as an 'invalid

CVE-2019-20445 in Netty before 4.1.44 allows a Content-Length
header to be accompanied by a second Content-Length header, or by a
Transfer-Encoding header.


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


The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded
memory allocation while decoding a ZlibEncoded byte stream. An
attacker could send a large ZlibEncoded byte stream to the Netty
server, forcing the server to allocate all of its free memory to a
single decoder.

Affected Software/OS:
'netty' package(s) on Debian Linux.

For Debian 9 stretch, these problems have been fixed in version

We recommend that you upgrade your netty packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-7238
RedHat Security Advisories: RHSA-2020:0497
RedHat Security Advisories: RHSA-2020:0567
RedHat Security Advisories: RHSA-2020:0601
RedHat Security Advisories: RHSA-2020:0605
RedHat Security Advisories: RHSA-2020:0606
RedHat Security Advisories: RHSA-2020:0804
RedHat Security Advisories: RHSA-2020:0805
RedHat Security Advisories: RHSA-2020:0806
RedHat Security Advisories: RHSA-2020:0811
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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