CVE-2021-43667

Public Exploit

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.62%
Vendor Advisory hyperledger.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://jira.hyperledger.org/browse/FAB-18529 exploit vendor advisory
https://github.com/hyperledger/fabric/pull/2844 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-43667?
CVE-2021-43667 has been scored as a high severity vulnerability.
How to fix CVE-2021-43667?
To fix CVE-2021-43667, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43667 being actively exploited in the wild?
It is possible that CVE-2021-43667 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.