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CVE-2023-46232

Estado: ModificadaMedia (5.3)—

era-compiler-vyper is the EraVM Vyper compiler for zkSync Era, a layer 2 rollup that uses zero-knowledge proofs to scale Ethereum. Prior to era-compiler-vype version 1.3.10, a bug prevented the initialization of the first immutable variable for Vyper contracts meeting certain criteria. The problem arises when there is a String or Array with more 256-bit words allocated than initialized. It results in the second word’s index unset, that is effectively set to 0, so the first immutable value with the actual 0 index is overwritten in the ImmutableSimulator.

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Version 1.3.10 fixes this issue by setting all indexes in advance. The problem will go away, but it will get more expensive if the user allocates a lot of uninitialized space, e.g. `String[4096]`. Upgrading and redeploying affected contracts is the only way of working around the issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Matter-labs — Zkvyper

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-46232",
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "yes"
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            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-09-10T13:54:36.889917Z"
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  "published": "2023-10-25T22:15:09.477",
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      "value": "era-compiler-vyper is the EraVM Vyper compiler for zkSync Era, a layer 2 rollup that uses zero-knowledge proofs to scale Ethereum. Prior to era-compiler-vype version 1.3.10, a bug prevented the initialization of the first immutable variable for Vyper contracts meeting certain criteria. The problem arises when there is a String or Array with more 256-bit words allocated than initialized. It results in the second word’s index unset, that is effectively set to 0, so the first immutable value with the actual 0 index is overwritten in the ImmutableSimulator. Version 1.3.10 fixes this issue by setting all indexes in advance. The problem will go away, but it will get more expensive if the user allocates a lot of uninitialized space, e.g. `String[4096]`. Upgrading and redeploying affected contracts is the only way of working around the issue.\n"
    },
    {
      "lang": "es",
      "value": "era-compiler-vyper es el compilador EraVM Vyper para zkSync Era, un paquete acumulativo de capa 2 que utiliza pruebas de conocimiento cero para escalar Ethereum. Antes de la versión 1.3.10 de era-compiler-vype, un error impedía la inicialización de la primera variable inmutable para los contratos de Vyper que cumplían ciertos criterios. El problema surge cuando hay un String o Array con más palabras de 256 bits asignadas que inicializadas. Esto da como resultado que el índice de la segunda palabra no esté configurado, que efectivamente se establece en 0, por lo que el primer valor inmutable con el índice 0 real se sobrescribe en ImmutableSimulator. La versión 1.3.10 soluciona este problema configurando todos los índices por adelantado. El problema desaparecerá, pero será más costoso si el usuario asigna una gran cantidad de espacio no inicializado, por ejemplo, `String[4096]`. Actualizar y redistribuir los contratos afectados es la única forma de solucionar el problema."
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  "lastModified": "2026-06-17T06:30:27.360",
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