GHSA-QC84-GQF4-9926

Vulnerability from github – Published: 2022-02-16 22:36 – Updated: 2025-02-04 17:30
VLAI?
Summary
crossbeam-utils Unsoundness of AtomicCell<{i,u}64> arithmetics on 32-bit targets that support Atomic{I,U}64
Details

Impact

The affected versions of this crate incorrectly assumed that the alignment of {i,u}64 was always the same as Atomic{I,U}64.

However, the alignment of {i,u}64 on a 32-bit target can be smaller than Atomic{I,U}64.

This can cause the following problems:

  • Unaligned memory accesses
  • Data race

Crates using fetch_* methods with AtomicCell<{i,u}64> are affected by this issue.

32-bit targets without Atomic{I,U}64 and 64-bit targets are not affected by this issue. 32-bit targets with Atomic{I,U}64 and {i,u}64 have the same alignment are also not affected by this issue.

The following is a complete list of the builtin targets that may be affected. (last update: nightly-2022-02-11)

  • armv7-apple-ios (tier 3)
  • armv7s-apple-ios (tier 3)
  • i386-apple-ios (tier 3)
  • i586-unknown-linux-gnu
  • i586-unknown-linux-musl
  • i686-apple-darwin (tier 3)
  • i686-linux-android
  • i686-unknown-freebsd
  • i686-unknown-haiku (tier 3)
  • i686-unknown-linux-gnu
  • i686-unknown-linux-musl
  • i686-unknown-netbsd (tier 3)
  • i686-unknown-openbsd (tier 3)
  • i686-wrs-vxworks (tier 3)

(script to get list)

Patches

This has been fixed in crossbeam-utils 0.8.7.

Affected 0.8.x releases have been yanked.

References

https://github.com/crossbeam-rs/crossbeam/pull/781

License

This advisory is in the public domain.

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "crossbeam-utils"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.8.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-23639"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-02-16T22:36:21Z",
    "nvd_published_at": "2022-02-15T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nThe affected versions of this crate incorrectly assumed that the alignment of `{i,u}64` was always the same as `Atomic{I,U}64`. \n\nHowever, the alignment of `{i,u}64` on a 32-bit target can be smaller than `Atomic{I,U}64`.\n\nThis can cause the following problems:\n\n- Unaligned memory accesses\n- Data race\n\nCrates using `fetch_*` methods with `AtomicCell\u003c{i,u}64\u003e` are affected by this issue.\n\n32-bit targets without `Atomic{I,U}64` and 64-bit targets are not affected by this issue.\n32-bit targets with `Atomic{I,U}64` and `{i,u}64` have the same alignment are also not affected by this issue.\n\nThe following is a complete list of the builtin targets that may be affected. (last update: nightly-2022-02-11)\n\n- armv7-apple-ios (tier 3)\n- armv7s-apple-ios (tier 3)\n- i386-apple-ios (tier 3)\n- i586-unknown-linux-gnu\n- i586-unknown-linux-musl\n- i686-apple-darwin (tier 3)\n- i686-linux-android\n- i686-unknown-freebsd\n- i686-unknown-haiku (tier 3)\n- i686-unknown-linux-gnu\n- i686-unknown-linux-musl\n- i686-unknown-netbsd (tier 3)\n- i686-unknown-openbsd (tier 3)\n- i686-wrs-vxworks (tier 3)\n\n([script to get list](https://gist.github.com/taiki-e/3c7891e8c5f5e0cbcb44d7396aabfe10))\n\n### Patches\n\nThis has been fixed in crossbeam-utils 0.8.7.\n\nAffected 0.8.x releases have been yanked.\n\n### References\n\nhttps://github.com/crossbeam-rs/crossbeam/pull/781 \n\n### License\n\nThis advisory is in the public domain.",
  "id": "GHSA-qc84-gqf4-9926",
  "modified": "2025-02-04T17:30:19Z",
  "published": "2022-02-16T22:36:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23639"
    },
    {
      "type": "WEB",
      "url": "https://github.com/crossbeam-rs/crossbeam/pull/781"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/crossbeam-rs/crossbeam"
    },
    {
      "type": "WEB",
      "url": "https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2022-0041.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "crossbeam-utils Unsoundness of AtomicCell\u003c{i,u}64\u003e arithmetics on 32-bit targets that support Atomic{I,U}64"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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