CVE-2024-32649

vyper performs double eval of the argument of sqrt

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.

Affected

vyperlang · vyper

CVSS v3.1 NVD

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.46% chance of exploitation in the next 30 days, 38th percentile

Published

2024-04-25

Updated

2024-08-02

Proof-of-concept exploits (1)

• advisories/GHSA-5jrj-52x8-m64h

Security advisories

• vyperlang/vyper/security/advisories/GHSA-5jrj-52x8-m64h

References

• CVE Record
• NVD entry