CVE-2022-29255 – vyper

Package

Manager: pip
Name: vyper
Vulnerable Version: >=0 <0.3.4

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00344 pctl0.56322

Details

Multiple evaluation of contract address in call in vyper ### Impact when a calling an external contract with no return value, the contract address could be evaluated twice. this is usually only an efficiency problem, but if evaluation of the contract address has side effects, it could result in double evaluation of the side effects. in the following example, `Foo(msg.sender).bar()` is the contract address for the following call (to `.foo()`), and could get evaluated twice ```vyper interface Foo: def foo(): nonpayable def bar() -> address: nonpayable @external def do_stuff(): Foo(Foo(msg.sender).bar()).foo() ``` ### Patches 6b4d8ff185de071252feaa1c319712b2d6577f8d ### Workarounds assign contract addresses to variables. the above example would change to ```vyper @external def do_stuff(): t: Foo = Foo(msg.sender).bar() t.foo() ``` ### References ### For more information

Metadata

Created: 2022-06-06T21:23:58Z
Modified: 2024-11-19T16:17:52Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/06/GHSA-4v9q-cgpw-cf38/GHSA-4v9q-cgpw-cf38.json
CWE IDs: ["CWE-670"]
Alternative ID: GHSA-4v9q-cgpw-cf38
Finding: F164
Auto approve: 1