GHSA-Q948-X8RF-888M

Vulnerability from github – Published: 2021-08-25 20:47 – Updated: 2023-06-13 20:12
VLAI?
Summary
os_str_bytes relies on undefined behavior of `char::from_u32_unchecked`
Details

The Windows implementation of this crate relied on the behavior of std::char::from_u32_unchecked when its safety clause is violated. Even though this worked with Rust versions up to 1.42 (at least), that behavior could change with any new Rust version, possibly leading a security issue.

The flaw was corrected in version 2.0.0.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "os_str_bytes"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-35865"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-704"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T21:08:17Z",
    "nvd_published_at": "2020-12-31T10:15:00Z",
    "severity": "HIGH"
  },
  "details": "The Windows implementation of this crate relied on the behavior of std::char::from_u32_unchecked when its safety clause is violated. Even though this worked with Rust versions up to 1.42 (at least), that behavior could change with any new Rust version, possibly leading a security issue.\n\nThe flaw was corrected in version 2.0.0.",
  "id": "GHSA-q948-x8rf-888m",
  "modified": "2023-06-13T20:12:22Z",
  "published": "2021-08-25T20:47:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35865"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dylni/os_str_bytes/pull/1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dylni/os_str_bytes"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0012.html"
    }
  ],
  "schema_version": "1.4.0",
  "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": "os_str_bytes relies on undefined behavior of `char::from_u32_unchecked`"
}


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