CVE-2022-24787

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.

How to fix CVE-2022-24787

To remediate CVE-2022-24787, upgrade the affected package to a fixed version below.

• —upgrade to 0.3.2 or later
• —upgrade to 2c73f8352635c0a433423a5b94740de1a118e508 or later

Is CVE-2022-24787 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 0.3.2
• from 0, < 2c73f8352635c0a433423a5b94740de1a118e508 | from 0, < 0.3.2

CVSS scores

References (4)

• PATCHgithub.com/vyperlang/vyper
• WEBgithub.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2022-196.yaml
• WEBgithub.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508
• WEBgithub.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwm