rustsec-2018-0022
Vulnerability from osv_rustsec
Published
2018-08-22 12:00
Modified
2023-06-13 13:10
Summary
Use of uninitialized memory in temporary
Details

Uninit memory is used as a RNG seed in temporary

The following function is used as a way to get entropy from the system, which does operations on and exposes uninit memory, which is UB.

fn random_seed(_: &Path, _: &str) -> [u64; 2] {
    use std::mem::uninitialized as rand;
    unsafe { [rand::<u64>() ^ 0x12345678, rand::<u64>() ^ 0x87654321] }
}

This has been resolved in the 0.6.4 release.

The crate is not intended to be used outside of a testing environment.

For a general purpose crate to create temporary directories, tempfile is an alternative for this crate.

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-exposure"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "temporary",
        "purl": "pkg:cargo/temporary"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.0"
            },
            {
              "fixed": "0.6.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-2jq9-6xx7-3h29"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Uninit memory is used as a RNG seed in temporary\n\nThe following function is used as a way to get entropy from the system, which does operations on and exposes uninit memory, which is UB.\n\n```rust\nfn random_seed(_: \u0026Path, _: \u0026str) -\u003e [u64; 2] {\n    use std::mem::uninitialized as rand;\n    unsafe { [rand::\u003cu64\u003e() ^ 0x12345678, rand::\u003cu64\u003e() ^ 0x87654321] }\n}\n```\n\nThis has been resolved in the 0.6.4 release.\n\nThe crate is not intended to be used outside of a testing environment.\n\nFor a general purpose crate to create temporary directories, [`tempfile`](https://crates.io/crates/tempfile) is an alternative for this crate.",
  "id": "RUSTSEC-2018-0022",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2018-08-22T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/temporary"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2018-0022.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/stainless-steel/temporary/issues/2"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Use of uninitialized memory in temporary"
}


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