Upstream information

CVE-2020-11612 at MITRE


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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.5 5.3
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High Low
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entries: 1168932 [RESOLVED / FIXED], 1169082 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES15-SP3-Manager-4-2-Server-BYOS-Azure
Image SLES15-SP3-Manager-4-2-Server-BYOS-EC2-HVM
Image SLES15-SP3-Manager-4-2-Server-BYOS-GCE
  • netty >= 4.1.44.Final-150300.4.3.2
Image SLES15-SP4-Manager-Server-4-3-BYOS
Image SLES15-SP4-Manager-Server-4-3-BYOS-Azure
Image SLES15-SP4-Manager-Server-4-3-BYOS-EC2
Image SLES15-SP4-Manager-Server-4-3-BYOS-GCE
  • netty >= 4.1.44.Final-150400.3.3.2
SUSE Manager Server Module 4.1
  • netty >= 4.1.44.Final-150200.3.4.2
SUSE Manager Server Module 4.2
  • netty >= 4.1.44.Final-150300.4.3.2
SUSE Manager Server Module 4.3
  • netty >= 4.1.44.Final-150400.3.3.2
openSUSE Tumbleweed
  • netty >= 4.1.60-1.4
  • netty-javadoc >= 4.1.60-1.4
  • netty-poms >= 4.1.60-1.4
openSUSE Tumbleweed GA netty-4.1.60-1.4

First public cloud image revisions this CVE is fixed in:

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Module for Package Hub 15 SP5 netty Already fixed
SUSE Manager Server Module 4.2 netty Released
SUSE Manager Server Module 4.3 netty Released
Products past their end of life and not receiving proactive updates anymore.
SUSE Manager Server 3.2 netty Unsupported
SUSE Manager Server Module 4.0 netty Unsupported
SUSE Manager Server Module 4.1 netty Released

SUSE Timeline for this CVE

CVE page created: Tue Apr 7 23:18:19 2020
CVE page last modified: Mon Sep 11 20:32:20 2023