CVE-2022-24787
High
Description
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one ends with `"\x00"` because there is no comparison of the length. A patch is available and expected to be part of the 0.3.2 release. There are currently no known workarounds.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Vyper
PublishedApr 4, 2022
First seenApr 4, 2022
Weakness typeCWE-697CWE-697
How to fix
Update
- vyper0.3.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vyperlang vyper | v ≤ 0.3.1 | — |
| vyperPyPI | v < 0.3.2 | 0.3.2 |
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