Incorrect Comparison in Vyper
CVE-2022-24787

7.5HIGH

Key Information:

Vendor

Vyperlang

Status
Vyper
Vendor
CVE Published:
4 April 2022

What is CVE-2022-24787?

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.

Affected Version(s)

vyper <= 0.3.1

References

https://github.com/vyperlang/vyper/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/vyperlang/vyper/commit/2c73f8352635c0a...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.