rustsec-2022-0074
Vulnerability from osv_rustsec
Published
2022-12-02 12:00
Modified
2023-06-13 13:10
Summary
Force cast a &Vec<T> to &[T]
Details

In function Table::as_ref, a reference of vector is force cast to slice. There are multiple problems here: 1. To guarantee the size is correct, we have to first do Vec::shrink_to_fit. The function requires a mutable reference, so we have to force cast from immutable to mutable, which is UB. 2. Even if (1) is sound, &Vec<T> and &[T] still might not have the same layout. Treating them equally may lead to UB.

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{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "prettytable-rs",
        "purl": "pkg:cargo/prettytable-rs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-gfgm-chr3-x6px"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "In function `Table::as_ref`, a reference of vector is force cast to slice. There are multiple problems here:\n1. To guarantee the size is correct, we have to first do `Vec::shrink_to_fit`. The function requires a mutable reference, so we have to force cast from immutable to mutable, which is UB.\n2. Even if (1) is sound, `\u0026Vec\u003cT\u003e` and `\u0026[T]` still might not have the same layout. Treating them equally may lead to UB.",
  "id": "RUSTSEC-2022-0074",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2022-12-02T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/prettytable-rs"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2022-0074.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/phsym/prettytable-rs/issues/145"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Force cast a \u0026Vec\u003cT\u003e to \u0026[T]"
}


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