CVE-2023-46132

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.
References
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:*
cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:*

History

22 Nov 2023, 15:12

Type Values Removed Values Added
New CVE

Information

Published : 2023-11-14 21:15

Updated : 2024-02-05 00:22


NVD link : CVE-2023-46132

Mitre link : CVE-2023-46132

CVE.ORG link : CVE-2023-46132


JSON object : View

Products Affected

hyperledger

  • fabric
CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')