CVE-2024-32647CWE-95

vyper performs double eval of raw_args in create_from_blueprint

Medium · published April 25, 2024

CVSS v3.1
5.3
EPSS
0%
Percentile
38.6
In the wild
Unconfirmed
What it is

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `create_from_blueprint` builtin can result in a double eval vulnerability when `raw_args=True` and the `args` argument has side-effects. It can be seen that the `_build_create_IR` function of the `create_from_blueprint` builtin doesn't cache the mentioned `args` 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 exist.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00455 · 38.6th percentile
Weakness
CWE-95 · Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Published
2024-04-25T17:41Z
EPSS history
Timeline
  • 25 APR 17:41Z
    vyper performs double eval of raw_args in create_from_blueprint
    cvelistv5