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CVE-2023-46232— era-compiler-vyper First Immutable Variable Initialization vulnerability

Quick assessment

Affected
matter-labs era-compiler-vyper
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

era-compiler-vyper是EraVM Vyper编译器。 era-compiler-vyper 1.3.10之前版本存在安全漏洞，该漏洞源于存在内存问题。

CVSS 5.3 · Medium EPSS 0.56% · P46
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I. Basic Information for CVE-2023-46232

Vulnerability Information
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Vulnerability Title
era-compiler-vyper First Immutable Variable Initialization vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对假设不可变数据的修改(MAID)
Source: CVE Program / CVE List V5
Vulnerability Title
era-compiler-vyper 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
era-compiler-vyper是EraVM Vyper编译器。 era-compiler-vyper 1.3.10之前版本存在安全漏洞，该漏洞源于存在内存问题。
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
matter-labs era-compiler-vyper < 1.3.10 -

II. Public POCs for CVE-2023-46232

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III. Intelligence Information for CVE-2023-46232

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Patches & Fixes for CVE-2023-46232 (1)

Vendor Advisories for CVE-2023-46232 (1)

Other References for CVE-2023-46232 (1)

IV. Related Vulnerabilities

Same product: era-compiler-vyper
Same vendor: matter-labs
Same weakness: CWE-471

V. Comments for CVE-2023-46232

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