{
  "schema_version": "1.3.1",
  "id": "GO-2023-1559",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2023-23631",
    "GHSA-4gj3-6r43-3wfc"
  ],
  "summary": "Denial of service via HAMT decoding panic in github.com/ipfs/go-unixfsnode",
  "details": "Trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks. If 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.\n\nThere are no known workarounds (users are advised to upgrade).",
  "affected": [
    {
      "package": {
        "name": "github.com/ipfs/go-unixfsnode",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.2"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/ipfs/go-unixfsnode/hamt",
            "symbols": [
              "AttemptHAMTShardFromNode",
              "NewUnixFSHAMTShard",
              "NewUnixFSHAMTShardWithPreload",
              "_UnixFSHAMTShard.Length",
              "_UnixFSHAMTShard.Lookup",
              "_UnixFSHAMTShard.LookupByNode",
              "_UnixFSHAMTShard.LookupBySegment",
              "_UnixFSHAMTShard.LookupByString",
              "_UnixFSShardedDir__ListItr.Next",
              "bitField"
            ]
          },
          {
            "path": "github.com/ipfs/go-unixfsnode/data/builder",
            "symbols": [
              "BlockSizes",
              "BuildUnixFS",
              "BuildUnixFSDirectory",
              "BuildUnixFSFile",
              "BuildUnixFSRecursive",
              "BuildUnixFSShardedDirectory",
              "BuildUnixFSSymlink",
              "Data",
              "DataType",
              "Fanout",
              "FileSize",
              "FractionalNanoseconds",
              "HashType",
              "Mtime",
              "Permissions",
              "PermissionsString",
              "Seconds",
              "Time",
              "shard.bitmap",
              "shard.serialize"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076"
    }
  ],
  "credits": [
    {
      "name": "Jorropo"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2023-1559"
  }
}