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CVE-2023-46132— Crosslinking transaction attack in hyperledger/fabric

Quick assessment

Affected
hyperledger fabric
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hyperledger Fabric是一个企业级许可的分布式账本框架。用于开发解决方案和应用程序。 Hyperledger Fabri存在安全漏洞，该漏洞源于进行哈希处理的方式存在漏洞，攻击者可以制作一个交叉链接块，从而改变对等点处理交易的方式。

CVSS 7.1 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2023-46132

Vulnerability Information
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Vulnerability Title
Crosslinking transaction attack in hyperledger/fabric
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Hyperledger Fabric 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hyperledger Fabric是一个企业级许可的分布式账本框架。用于开发解决方案和应用程序。 Hyperledger Fabri存在安全漏洞，该漏洞源于进行哈希处理的方式存在漏洞，攻击者可以制作一个交叉链接块，从而改变对等点处理交易的方式。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hyperledger fabric >= 1.0.0, < 2.2.14 -

II. Public POCs for CVE-2023-46132

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10882 chars
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III. Intelligence Information for CVE-2023-46132

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Vendor Advisories for CVE-2023-46132 (1)

IV. Related Vulnerabilities

Same product: fabric
Same vendor: hyperledger
Same weakness: CWE-362

V. Comments for CVE-2023-46132

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