What is the severity of CVE-2021-43667?

CVE-2021-43667 has been classified as a moderate severity vulnerability affecting HyperLedger Fabric versions 1.4.0, 2.0.0, and 2.1.0.

How do I fix CVE-2021-43667?

To fix CVE-2021-43667, upgrade to the patched versions of HyperLedger Fabric as released by the developers.

What versions are affected by CVE-2021-43667?

CVE-2021-43667 affects HyperLedger Fabric versions 1.4.0, 2.0.0, and 2.1.0.

What type of vulnerability is CVE-2021-43667?

CVE-2021-43667 is a vulnerability that can be exploited by constructing a specific type of message with a nil payload.

Has CVE-2021-43667 been acknowledged by the developers?

Yes, the developers of HyperLedger Fabric have acknowledged and fixed the vulnerability CVE-2021-43667.

Vulnerability/
CVE-2021-43667

high

7.5

CWE

476

18/11/2021

21/11/2024

CVE-2021-43667: Null Pointer Dereference

First published: Thu Nov 18 2021(Updated: )

A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.1.0. This bug can be leveraged by constructing a message whose payload is nil and sending this message with the method 'forwardToLeader'. This bug has been admitted and fixed by the developers of Fabric. If leveraged, any leader node will crash.

Credit: cve@mitre.org cve@mitre.org

Affected Software	Affected Version	How to fix
Linuxfoundation Fabric	=1.4.0
Linuxfoundation Fabric	=2.0.0
Linuxfoundation Fabric	=2.1.0
	=1.4.0
	=2.0.0
	=2.1.0

Remedy

https://github.com/hyperledger/fabric/pull/2844

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-43667?
CVE-2021-43667 has been classified as a moderate severity vulnerability affecting HyperLedger Fabric versions 1.4.0, 2.0.0, and 2.1.0.
How do I fix CVE-2021-43667?
To fix CVE-2021-43667, upgrade to the patched versions of HyperLedger Fabric as released by the developers.
What versions are affected by CVE-2021-43667?
CVE-2021-43667 affects HyperLedger Fabric versions 1.4.0, 2.0.0, and 2.1.0.
What type of vulnerability is CVE-2021-43667?
CVE-2021-43667 is a vulnerability that can be exploited by constructing a specific type of message with a nil payload.
Has CVE-2021-43667 been acknowledged by the developers?
Yes, the developers of HyperLedger Fabric have acknowledged and fixed the vulnerability CVE-2021-43667.

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collector/mitre-cve
source/MITRE
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agent/description
agent/first-publish-date
collector/nvd-api
source/NVD
agent/software-canonical-lookup
agent/last-modified-date
agent/author
agent/softwarecombine
agent/event
agent/tags
agent/source
vendor/linuxfoundation
canonical/linuxfoundation fabric
version/linuxfoundation fabric/1.4.0
version/linuxfoundation fabric/2.0.0
version/linuxfoundation fabric/2.1.0

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