GHSA-H7H7-6MX3-R89V

Vulnerability from github – Published: 2025-02-14 17:31 – Updated: 2025-02-14 17:31
VLAI?
Summary
Fyrox has unsound usages of `Vec::from_raw_parts`
Details

The library provides a public safe API transmute_vec_as_bytes, which incorrectly assumes that any generic type T could have stable layout, causing to uninitialized memory exposure if the users pass any types with padding bytes as T and cast it to u8 pointer.

In the issue, we develop a PoC to show passing struct type to transmute_vec_as_bytes could lead to undefined behavior with Vec::from_raw_parts.

The developers provide a patch by changing trait of Copy to Pod, which can make sure T should be plain data. This was patched in the latest version of master branch, but still not on the latest release (0.28.1).

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "fyrox-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.28.1"
            },
            {
              "fixed": "0.36"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2025-02-14T17:31:16Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "The library provides a public safe API `transmute_vec_as_bytes`, which incorrectly assumes that any generic type `T` could have stable layout, causing to uninitialized memory exposure if the users pass any types with padding bytes as `T` and cast it to `u8` pointer.  \n\nIn the [issue](https://github.com/FyroxEngine/Fyrox/issues/630), we develop a PoC to show passing struct type to `transmute_vec_as_bytes` could lead to undefined behavior with `Vec::from_raw_parts`.  \n\nThe developers provide a patch by changing trait of `Copy` to `Pod`, which can make sure `T` should be plain data. This was patched in the latest version of [master](https://github.com/FyroxEngine/Fyrox/blob/3f9ad6f9667047dac051b0e97d544e5b38e5ae72/fyrox-core/src/lib.rs#L351-L360) branch, but still not on the latest release (0.28.1).",
  "id": "GHSA-h7h7-6mx3-r89v",
  "modified": "2025-02-14T17:31:17Z",
  "published": "2025-02-14T17:31:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FyroxEngine/Fyrox/issues/630"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FyroxEngine/Fyrox/pull/662"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FyroxEngine/Fyrox/commit/474e3b01a884366cdb7d704f7456ef692e992232"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FyroxEngine/Fyrox"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0435.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Fyrox has unsound usages of `Vec::from_raw_parts` "
}


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