Description

Hyperledger Fabric is an open source permissioned distributed ledger framework. Combining two molecules to one another, called "cross-linking" results in a molecule with a chemical formula that is composed of all atoms of the original two molecules. In Fabric, one can take a block of transactions and cross-link the transactions in a way that alters the way the peers parse the transactions. If a first peer receives a block B and a second peer receives a block identical to B but with the transactions being cross-linked, the second peer will parse transactions in a different way and thus its world state will deviate from the first peer. Orderers or peers cannot detect that a block has its transactions cross-linked, because there is a vulnerability in the way Fabric hashes the transactions of blocks. It simply and naively concatenates them, which is insecure and lets an adversary craft a "cross-linked block" (block with cross-linked transactions) which alters the way peers process transactions. For example, it is possible to select a transaction and manipulate a peer to completely avoid processing it, without changing the computed hash of the block. Additional validations have been added in v2.2.14 and v2.5.5 to detect potential cross-linking issues before processing blocks. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Severity

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

CVSS 4.0 Severity and Metrics:

NIST: NVD

N/A

NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  6.5 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CNA:  GitHub, Inc.

Base Score:  7.1 HIGH

Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m	Exploit  Mitigation  Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-362	Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')	GitHub, Inc.

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Change History

3 change records found show changes

CVE Modified by GitHub, Inc. 5/14/2024 9:53:01 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 11/22/2023 10:12:30 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (excluding) 2.2.14 *cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:* versions from (including) 2.3.0 up to (excluding) 2.5.5
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Changed	Reference Type	https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m No Types Assigned	https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m Exploit, Mitigation, Vendor Advisory

New CVE Received by NIST 11/14/2023 4:15:11 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		GitHub, Inc. AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Added	CWE		GitHub, Inc. CWE-362
Added	Description		Record truncated, showing 500 of 1376 characters. View Entire Change Record Hyperledger Fabric is an open source permissioned distributed ledger framework. Combining two molecules to one another, called "cross-linking" results in a molecule with a chemical formula that is composed of all atoms of the original two molecules. In Fabric, one can take a block of transactions and cross-link the transactions in a way that alters the way the peers parse the transactions. If a first peer receives a block B and a second peer receives a block identical to B but with the transacti
Added	Reference		GitHub, Inc. https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m [No types assigned]