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NULL Pointer Dereference in HyperLedger Fabric

High severity GitHub Reviewed Published May 25, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

gomod github.com/hyperledger/fabric (Go)

Affected versions

>= 2.3.0, < 2.3.3
< 2.2.4

Patched versions

2.3.3
2.2.4

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.

References

Published by the National Vulnerability Database Nov 18, 2021
Published to the GitHub Advisory Database May 25, 2022
Reviewed May 25, 2022
Last updated Jan 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.134%
(50th percentile)

Weaknesses

CVE ID

CVE-2021-43667

GHSA ID

GHSA-vjj6-5m9f-wqjw

Source code

github.com/hyperledger/fabric
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