CVE-2023-46132

{
  "id": "CVE-2023-46132",
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          "version": "2.0.3",
          "timestamp": "2024-08-29T20:19:34.464828Z"
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        "exploitabilityScore": 2.8
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  "affected": [
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      "affectedData": [
        {
          "vendor": "hyperledger",
          "product": "fabric",
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            {
              "status": "affected",
              "version": ">= 1.0.0, < 2.2.14"
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  "published": "2023-11-14T21:15:11.003",
  "references": [
    {
      "url": "https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
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    {
      "url": "https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
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      "type": "Secondary",
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      "description": [
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          "lang": "en",
          "value": "CWE-362"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Hyperledger Fabric es un framework de contabilidad distribuido con permisos de código abierto. La combinación de dos moléculas entre sí, lo que se denomina \"cross-linking\", da como resultado una molécula con una fórmula química que está compuesta por todos los átomos de las dos moléculas originales. En Fabric, se puede tomar un bloque de transacciones y vincular las transacciones de una manera que altere la forma en que los pares analizan las transacciones. Si un primer par recibe un bloque B y un segundo par recibe un bloque idéntico a B pero con las transacciones cross-linked, el segundo par analizará las transacciones de una manera diferente y, por lo tanto, su estado mundial se desviará del primer par. Los ordenantes o pares no pueden detectar que un bloque tiene sus transacciones cross-linked, porque existe una vulnerabilidad en la forma en que Fabric procesa las transacciones de los bloques. Los concatena de manera simple e ingenua, lo cual es inseguro y permite que un adversario cree un \"cross-linked block\" (bloque con transacciones entrecruzadas) que altera la forma en que los pares procesan las transacciones. Por ejemplo, es posible seleccionar una transacción y manipular un par para evitar por completo procesarla, sin cambiar el hash calculado del bloque. Se agregaron validaciones adicionales en v2.2.14 y v2.5.5 para detectar posibles problemas de cross-linking antes de procesar bloques. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T06:30:13.147",
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