GHSA-G753-GHR7-Q33W

Vulnerability from github – Published: 2023-06-22 20:01 – Updated: 2023-06-22 20:01
VLAI?
Summary
cyfs-base vulnerable to misaligned pointer dereference in `ChunkId::new`
Details

The function ChunkId::new creates a misaligned pointer by casting mutable pointer of u8 slice which has alignment 1 to the mutable pointer of u32 which has alignment 4, and dereference the misaligned pointer leading UB, which should not be allowed in safe function.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "cyfs-base"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.6.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-22T20:01:55Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The function `ChunkId::new` creates a misaligned pointer by casting mutable pointer of `u8` slice which has alignment 1 to the mutable pointer of `u32` which has alignment 4, and dereference the misaligned pointer leading UB, which should not be allowed in safe function.\n",
  "id": "GHSA-g753-ghr7-q33w",
  "modified": "2023-06-22T20:01:55Z",
  "published": "2023-06-22T20:01:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/buckyos/CYFS/issues/275"
    },
    {
      "type": "WEB",
      "url": "https://github.com/buckyos/CYFS/commit/e030188895096fd8d91d48753877729f4d37dd24"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/buckyos/CYFS"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0046.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "cyfs-base vulnerable to misaligned pointer dereference in `ChunkId::new`"
}


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