{"id":"CVE-2024-32646","summary":"vyper performs double eval of the slice args when buffer from adhoc locations","details":"Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `slice` builtin can result in a double eval vulnerability when the buffer argument is either `msg.data`, `self.code` or `\u003caddress\u003e.code` and either the `start` or `length` arguments have side-effects. It can be easily triggered only with the versions `\u003c0.3.4` as `0.3.4` introduced the unique symbol fence. 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\n","aliases":["GHSA-r56x-j438-vw5m","PYSEC-2024-207"],"modified":"2026-05-15T04:09:36.577060953Z","published":"2024-04-25T17:21:59.687Z","database_specific":{"cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/32xxx/CVE-2024-32646.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/32xxx/CVE-2024-32646.json"},{"type":"ADVISORY","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-32646"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}