CVE-2020-11612

Published: 7 April 2020

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.

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
netty Launchpad, Ubuntu, Debian	trusty	Needs triage
	upstream	Released (1:4.1.48-1)
	eoan	Ignored (end of life)
	bionic	Released (1:4.1.7-4ubuntu0.1)
	impish	Not vulnerable (1:4.1.48-1)
	groovy	Not vulnerable (1:4.1.48-1)
	hirsute	Not vulnerable (1:4.1.48-1)
	jammy	Not vulnerable (1:4.1.48-1)
	kinetic	Not vulnerable (1:4.1.48-1)
	lunar	Not vulnerable (1:4.1.48-1)
	xenial	Released (1:4.0.34-1ubuntu0.1~esm1) Available with Ubuntu Pro
	focal	Released (1:4.1.45-1ubuntu0.1~esm1) Available with Ubuntu Pro

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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