FKIE_CVE-2023-39363

Vulnerability from fkie_nvd - Published: 2023-08-07 19:15 - Updated: 2024-11-21 08:15
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). In versions 0.2.15, 0.2.16 and 0.3.0, named re-entrancy locks are allocated incorrectly. Each function using a named re-entrancy lock gets a unique lock regardless of the key, allowing cross-function re-entrancy in contracts compiled with the susceptible versions. A specific set of conditions is required to result in misbehavior of affected contracts, specifically: a `.vy` contract compiled with `vyper` versions `0.2.15`, `0.2.16`, or `0.3.0`; a primary function that utilizes the `@nonreentrant` decorator with a specific `key` and does not strictly follow the check-effects-interaction pattern (i.e. contains an external call to an untrusted party before storage updates); and a secondary function that utilizes the same `key` and would be affected by the improper state caused by the primary function. Version 0.3.1 contains a fix for this issue.
References
security-advisories@github.comhttps://github.com/vyperlang/vyper/pull/2439Patch
security-advisories@github.comhttps://github.com/vyperlang/vyper/pull/2514Patch
security-advisories@github.comhttps://github.com/vyperlang/vyper/security/advisories/GHSA-5824-cm3x-3c38Exploit, Patch, Third Party Advisory
security-advisories@github.comhttps://hackmd.io/@LlamaRisk/BJzSKHNjnExploit, Third Party Advisory
security-advisories@github.comhttps://hackmd.io/@vyperlang/HJUgNMhs2Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/pull/2439Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/pull/2514Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/security/advisories/GHSA-5824-cm3x-3c38Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackmd.io/@LlamaRisk/BJzSKHNjnExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackmd.io/@vyperlang/HJUgNMhs2Exploit, Third Party Advisory
Impacted products
Vendor Product Version
vyperlang vyper 0.2.15
vyperlang vyper 0.2.16
vyperlang vyper 0.3.0
To clipboard 

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  "id": "CVE-2023-39363",
  "lastModified": "2024-11-21T08:15:14.707",
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          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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