{"id":"GHSA-4gj3-6r43-3wfc","summary":"IPFS go-unixfsnode subject to DOS via HAMT Decoding Panics","details":"## Impact\n\nTrying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic.\n\nThis is caused by a bogus fanout parameter in the HAMT directory nodes.\nThis includes checks returned in [ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r](https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r), as well as limiting the fanout to \u003c= 1024 (to avoid attempts of arbitrary sized allocations).\n\n## Patches\n- https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68\n- https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122\n\n## References\n\n* https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778\n* https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r\n","aliases":["CVE-2023-23631","GO-2023-1559"],"modified":"2026-09-10T03:49:56.605610741Z","published":"2023-02-10T19:54:14Z","database_specific":{"github_reviewed_at":"2023-02-10T19:54:14Z","nvd_published_at":"2023-02-09T21:15:00Z","cwe_ids":["CWE-400"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23631"},{"type":"WEB","url":"https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076"},{"type":"WEB","url":"https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68"},{"type":"WEB","url":"https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122"},{"type":"PACKAGE","url":"https://github.com/ipfs/go-unixfsnode"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2023-1559"}],"affected":[{"package":{"name":"github.com/ipfs/go-unixfsnode","ecosystem":"Go","purl":"pkg:golang/github.com/ipfs/go-unixfsnode"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.5.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-4gj3-6r43-3wfc/GHSA-4gj3-6r43-3wfc.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:N/A:H"}]}