CVE-2021-43669

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-18 · updated 2026-06-17
Weakness: CWE-444

Description

A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.

Affected products

Linuxfoundation Fabric: 1.4.0, 2.0.0, 2.0.1, 2.3.0

References

https://github.com/hyperledger/fabric/pull/2828
https://jira.hyperledger.org/browse/FAB-18528
https://github.com/hyperledger/fabric/pull/2828
https://jira.hyperledger.org/browse/FAB-18528

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