GHSA-8892-84WF-CG8F

Vulnerability from github – Published: 2021-08-25 21:00 – Updated: 2023-06-13 21:01
VLAI?
Summary
SyncChannel<T> can move 'T: !Send' to other threads
Details

Affected versions of this crate unconditionally implement Send/Sync for SyncChannel<T>. SyncChannel<T> doesn't provide access to &T but merely serves as a channel that consumes and returns owned T. Users can create UB in safe Rust by sending T: !Send to other threads with SyncChannel::send/recv APIs. Using T = Arc<Cell<_> allows to create data races (which can lead to memory corruption), and using T = MutexGuard<T> allows to unlock a mutex from a thread that didn't lock the mutex.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "signal-simple"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-06T18:04:55Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "Affected versions of this crate unconditionally implement Send/Sync for `SyncChannel\u003cT\u003e`. `SyncChannel\u003cT\u003e` doesn\u0027t provide access to `\u0026T` but merely serves as a channel that consumes and returns owned `T`. Users can create UB in safe Rust by sending `T: !Send` to other threads with `SyncChannel::send/recv` APIs. Using `T = Arc\u003cCell\u003c_\u003e` allows to create data races (which can lead to memory corruption), and using `T = MutexGuard\u003cT\u003e` allows to unlock a mutex from a thread that didn\u0027t lock the mutex.\n",
  "id": "GHSA-8892-84wf-cg8f",
  "modified": "2023-06-13T21:01:55Z",
  "published": "2021-08-25T21:00:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kitsuneninetails/signal-rust/issues/2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kitsuneninetails/signal-rust"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0126.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": "SyncChannel\u003cT\u003e can move \u0027T: !Send\u0027 to other threads"
}


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