Description
Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. When using the built-in `extract32(b, start)`, if the `start` index provided has for side effect to update `b`, the byte array to extract `32` bytes from, it could be that some dirty memory is read and returned by `extract32`. This vulnerability is fixed in 0.4.0.
References (2)
Core 2
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/vyperlang/vyper/security/advisories/GHSA-4hwq-4cpm-8vmx
Scores
CVSS v3
3.7
EPSS
0.0036
EPSS Percentile
58.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (2)
pypi/vyper
0 - 0.4.0PyPI
vyperlang/vyper
< 0.4.0
Published
Feb 26, 2024
Tracked Since
Feb 18, 2026