rustsec-2019-0017
Vulnerability from osv_rustsec
Published
2019-09-01 12:00
Modified
2023-06-13 13:10
Summary
Panic during initialization of Lazy<T> might trigger undefined behavior
Details

If during the first dereference of Lazy the initialization function panics, subsequent dereferences will execute std::hints::unreachable_unchecked.

Applications with panic = "abort" are not affected, as there will be no subsequent dereferences.


{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "once_cell::sync::Lazy::deref",
            "once_cell::sync::Lazy::force",
            "once_cell::unsync::Lazy::deref",
            "once_cell::unsync::Lazy::force"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "once_cell",
        "purl": "pkg:cargo/once_cell"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.2.5"
            },
            {
              "fixed": "1.0.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2019-16141",
    "GHSA-7j44-fv4x-79g9"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "If during the first dereference of Lazy\u003cT\u003e the initialization function panics,\nsubsequent dereferences will execute `std::hints::unreachable_unchecked`.\n\nApplications with `panic = \"abort\"` are not affected, as there will be no\nsubsequent dereferences.",
  "id": "RUSTSEC-2019-0017",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2019-09-01T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/once_cell"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2019-0017.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/matklad/once_cell/issues/46"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Panic during initialization of Lazy\u003cT\u003e might trigger undefined behavior"
}


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