{
  "schema_version": "1.4.0",
  "id": "GHSA-f85w-wvc7-crwc",
  "modified": "2023-01-20T21:54:22Z",
  "published": "2023-01-20T21:54:22Z",
  "aliases": [],
  "summary": "bumpalo has use-after-free due to a lifetime error in `Vec::into_iter()`",
  "details": "In affected versions of this crate, the lifetime of the iterator produced by `Vec::into_iter()` is not constrained to the lifetime of the `Bump` that allocated the vector's memory. Using the iterator after the `Bump` is dropped causes use-after-free accesses.\n\nThe following example demonstrates memory corruption arising from a misuse of this unsoundness.\n\n```rust\nuse bumpalo::{collections::Vec, Bump};\n\nfn main() {\n    let bump = Bump::new();\n    let mut vec = Vec::new_in(&bump);\n    vec.extend([0x01u8; 32]);\n    let into_iter = vec.into_iter();\n    drop(bump);\n\n    for _ in 0..100 {\n        let reuse_bump = Bump::new();\n        let _reuse_alloc = reuse_bump.alloc([0x41u8; 10]);\n    }\n\n    for x in into_iter {\n        print!(\"0x{:02x} \", x);\n    }\n    println!();\n}\n```\n\nThe issue was corrected in version 3.11.1 by adding a lifetime to the `IntoIter` type, and updating the signature of `Vec::into_iter()` to constrain this lifetime.\n",
  "severity": [],
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "bumpalo"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "1.1.0"
            },
            {
              "fixed": "3.11.1"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://github.com/fitzgen/bumpalo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fitzgen/bumpalo/blob/main/CHANGELOG.md#3111"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2022-0078.html"
    }
  ],
  "database_specific": {
    "cwe_ids": [],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2023-01-20T21:54:22Z",
    "nvd_published_at": null
  }
}