GHSA-74R5-G7VC-J2V2

Vulnerability from github – Published: 2024-07-08 18:39 – Updated: 2024-07-09 19:45
VLAI?
Summary
zerovec-derive incorrectly uses `#[repr(packed)]`
Details

The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.

The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.

The patched versions 0.9.7 and 0.10.3 use #[repr(C, packed)], which guarantees field order.

Severity ?
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "zerovec-derive"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.10.0"
            },
            {
              "fixed": "0.10.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "zerovec-derive"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-120"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-08T18:39:18Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The affected versions make unsafe memory accesses under the assumption that `#[repr(packed)]` has a guaranteed field order. \n\nThe Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts \nreordering fields of `#[repr(packed)]` structs, leading to illegal memory accesses.\n\nThe patched versions `0.9.7` and `0.10.3` use `#[repr(C, packed)]`, which guarantees field order.\n",
  "id": "GHSA-74r5-g7vc-j2v2",
  "modified": "2024-07-09T19:45:09Z",
  "published": "2024-07-08T18:39:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/unicode-org/icu4x/issues/5196#issuecomment-2214711069"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rustsec/advisory-db/pull/2007"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0346.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "zerovec-derive incorrectly uses `#[repr(packed)]`"
}


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