CVE-2024-32649

vyper performs double eval of the argument of sqrt

Published Apr 25, 2024 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `sqrt` builtin can result in double eval vulnerability when the argument has side-effects. It can be seen that the `build_IR` function of the `sqrt` builtin doesn't cache the argument to the stack. As such, it can be evaluated multiple times (instead of retrieving the value from the stack). No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.

Analysis

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Remediation

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Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0185 Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `sqrt` builtin can result in double eval vulnerability when the argument has side-effects. It can be seen that the `build_IR` function of the `sqrt` builtin doesn't cache the argument to the stack. As such, it can be evaluated multiple times (instead of retrieving the value from the stack). No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.\n
Github GHSA Github GHSA GHSA-5jrj-52x8-m64h vyper performs multiple eval of `sqrt()` argument built in
History
Type Values Removed Values Added
Weaknesses NVD-CWE-Other
CPEs cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:python:*:*
Weaknesses
  • CWE-95

    Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

  • NVD-CWE-Other

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 2, 2024, 2:13 AM
Reserved
Apr 16, 2024, 2:15 PM
Status
Analyzed
Published
Apr 25, 2024, 6:15 PM
Modified
Jun 17, 2026, 7:30 AM