Hyperledger Fabric up to 2.2.13/2.5.4 race condition

Summaryinfo

A vulnerability described as critical has been identified in Hyperledger Fabric up to 2.2.13/2.5.4. Affected is an unknown function. The manipulation results in race condition. This vulnerability is identified as CVE-2023-46132. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Hyperledger Fabric up to 2.2.13/2.5.4. Affected is an unknown code block. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 11/14/2023. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-46132 since 10/16/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.2.14 or 2.5.5 eliminates this vulnerability.

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Productinfo

Vendor

• Hyperledger

Name

• Fabric

Version

• 2.2.0
• 2.2.1
• 2.2.2
• 2.2.3
• 2.2.4
• 2.2.5
• 2.2.6
• 2.2.7
• 2.2.8
• 2.2.9
• 2.2.10
• 2.2.11
• 2.2.12
• 2.2.13
• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4

Website

• Product: https://github.com/hyperledger/fabric/

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