RUSTSEC-2021-0082 (CVE-2021-45680)

Vulnerability from osv_rustsec – Published: 2021-08-14 12:00 – Updated: 2025-12-17 17:06 – Source website
VLAI
Summary
vec-const attempts to construct a Vec from a pointer to a const slice
Details

Affected versions of this crate claimed to construct a const Vec with nonzero length and capacity, but that cannot be done because such a Vec requires a pointer from an allocator.

The implementation was later changed to just construct a std::borrow::Cow.


{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "vec-const",
        "purl": "pkg:cargo/vec-const"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "2.0.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-45680",
    "GHSA-jmwx-r3gq-qq3p",
    "GHSA-x76r-966h-5qv9"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Affected versions of this crate claimed to construct a const `Vec` with nonzero length and capacity, but that cannot be done because such a `Vec` requires a pointer from an allocator.\n\nThe implementation was later changed to just construct a `std::borrow::Cow`.",
  "id": "RUSTSEC-2021-0082",
  "modified": "2025-12-17T17:06:41Z",
  "published": "2021-08-14T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/vec-const"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0082.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Eolu/vec-const/issues/1#issuecomment-898908241"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "vec-const attempts to construct a Vec from a pointer to a const slice"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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