CVE-2023-39363

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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)

OR	cpe:2.3:a:vyperlang:vyper:0.2.15:::::python::
	cpe:2.3:a:vyperlang:vyper:0.2.16:::::python::
	cpe:2.3:a:vyperlang:vyper:0.3.0:::::python::

History

No history.

Information

Published : 2023-08-07 19:15

Updated : 2023-09-18 21:15

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

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