{"id":"GHSA-mgv8-gggw-mrg6","summary":"vyper vulnerable to storage allocator overflow","details":"### Impact\nThe storage allocator does not guard against allocation overflows. This can result in vulnerabilities like the following:\n```vyper\nowner: public(address)\ntake_up_some_space: public(uint256[10])\nbuffer: public(uint256[max_value(uint256)])\n\n@external\ndef initialize():\n    self.owner = msg.sender\n\n@external\ndef foo(idx: uint256, data: uint256):\n    self.buffer[idx] = data\n```\nPer @toonvanhove, \"An attacker can overwrite the owner variable by calling this contract with calldata: `0x04bc52f8 fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff5 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff` (spaces inserted for readability)\n`0x04bc52f8` is the selector for `foo(uint256, uint256)`, and the last argument `fff...fff` is the new value for the owner variable.\"\n\n### Patches\npatched in 0bb7203b584e771b23536ba065a6efda457161bb\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\n### References\n_Are there any links users can visit to find out more?_\n","aliases":["CVE-2023-30837","PYSEC-2023-76"],"modified":"2024-11-19T16:47:37.865937Z","published":"2023-05-05T22:22:23Z","database_specific":{"cwe_ids":["CWE-789"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2023-05-05T22:22:23Z","nvd_published_at":"2023-05-08T17:15:12Z"},"references":[{"type":"WEB","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-mgv8-gggw-mrg6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-30837"},{"type":"WEB","url":"https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bb"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2023-76.yaml"},{"type":"PACKAGE","url":"https://github.com/vyperlang/vyper"}],"affected":[{"package":{"name":"vyper","ecosystem":"PyPI","purl":"pkg:pypi/vyper"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.8"}]}],"versions":["0.1.0b1","0.1.0b10","0.1.0b11","0.1.0b12","0.1.0b13","0.1.0b14","0.1.0b15","0.1.0b16","0.1.0b17","0.1.0b2","0.1.0b3","0.1.0b4","0.1.0b5","0.1.0b6","0.1.0b7","0.1.0b8","0.1.0b9","0.2.1","0.2.10","0.2.11","0.2.12","0.2.13","0.2.14","0.2.15","0.2.16","0.2.2","0.2.3","0.2.4","0.2.5","0.2.6","0.2.7","0.2.8","0.2.9","0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/05/GHSA-mgv8-gggw-mrg6/GHSA-mgv8-gggw-mrg6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V4","score":"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"}]}