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
Link | Resource |
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https://github.com/vyperlang/vyper/pull/2439 | Patch |
https://github.com/vyperlang/vyper/pull/2514 | Patch |
https://github.com/vyperlang/vyper/security/advisories/GHSA-5824-cm3x-3c38 | Exploit Patch Third Party Advisory |
https://hackmd.io/@LlamaRisk/BJzSKHNjn | Exploit Third Party Advisory |
https://hackmd.io/@vyperlang/HJUgNMhs2 | Exploit Third Party Advisory |
Configurations
Configuration 1 (hide)
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History
18 Sep 2023, 21:15
Type | Values Removed | Values Added |
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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. |
11 Aug 2023, 17:55
Type | Values Removed | Values Added |
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References | (MISC) https://github.com/vyperlang/vyper/security/advisories/GHSA-5824-cm3x-3c38 - Exploit, Patch, Third Party Advisory | |
References | (MISC) https://hackmd.io/@LlamaRisk/BJzSKHNjn - Exploit, Third Party Advisory | |
References | (MISC) https://hackmd.io/@vyperlang/HJUgNMhs2 - Exploit, Third Party Advisory | |
References | (MISC) https://github.com/vyperlang/vyper/pull/2514 - Patch | |
References | (MISC) https://github.com/vyperlang/vyper/pull/2439 - Patch | |
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.9 |
First Time |
Vyperlang vyper
Vyperlang |
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CPE | cpe:2.3:a:vyperlang:vyper:0.2.16:*:*:*:*:python:*:* cpe:2.3:a:vyperlang:vyper:0.2.15:*:*:*:*:python:*:* cpe:2.3:a:vyperlang:vyper:0.3.0:*:*:*:*:python:*:* |
07 Aug 2023, 19:30
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2023-08-07 19:15
Updated : 2024-10-11 14:15
NVD link : CVE-2023-39363
Mitre link : CVE-2023-39363
CVE.ORG link : CVE-2023-39363
JSON object : View
Products Affected
vyperlang
- vyper
CWE
CWE-863
Incorrect Authorization