# CVE-2021-43667: NULL Pointer Dereference in HyperLedger Fabric

Source: https://junglewise.ai/threats/cve-2021-43667-null-pointer-dereference-in-hyperledger-fabric  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-25  
License: CC BY 4.0 with a link back

CVE-2021-43667 · Severity: low · CVSS 3.1 · Published 2022-05-25

NULL Pointer Dereference in HyperLedger Fabric

Technologies: [github.com/hyperledger/fabric (Go)](https://junglewise.ai/threats/technologies/github-com-hyperledger-fabric). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2021-43667 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-43667 being exploited in the wild.

**How severe is CVE-2021-43667?** Low severity, with a CVSS score of 3.1, published 25 May 2022.

**Which products and versions are affected?** github.com/hyperledger/fabric (Go) SEMVER:introduced=2.3.0,fixed=2.3.3.

**Is there a fix for CVE-2021-43667?** Yes. github.com/hyperledger/fabric (Go): upgrade to 2.3.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-43667?** Check whether you run github.com/hyperledger/fabric (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/hyperledger/fabric (Go): upgrade to 2.3.3 or later

  ```sh
  go get github.com/hyperledger/fabric@v2.3.3
  ```


## Affected products

- github.com/hyperledger/fabric (Go) SEMVER:introduced=2.3.0,fixed=2.3.3

## Identifiers

- CVE-2021-43667
- GHSA-vjj6-5m9f-wqjw

## Related threats

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- [Fabric vulnerable to crosslinking transaction attack](https://junglewise.ai/threats/cve-2023-46132-fabric-vulnerable-to-crosslinking-transaction-attack)
- [Remote denial of service in Hyperledger Fabric Gateway](https://junglewise.ai/threats/cve-2022-36023-remote-denial-of-service-in-hyperledger-fabric-gateway)
- [Hyperledger Fabric subject to Denial of Service via non-validated request](https://junglewise.ai/threats/cve-2022-35253-hyperledger-fabric-subject-to-denial-of-service-via-non-validated)
- [Hyperledger Fabric vulnerable to Improper Input Validation in orderer/common/cluster consensus request](https://junglewise.ai/threats/cve-2022-31121-hyperledger-fabric-vulnerable-to-improper-input-validation-in)