Vulnerability-Lookup

RUSTSEC-2021-0031 (CVE-2021-28032)

Vulnerability from osv_rustsec – Published: 2021-01-31 12:00 – Updated: 2023-06-13 13:10 – Source website

Summary

split_at allows obtaining multiple mutable references to the same data

Details

Affected versions of this crate assumed that Borrow<Idx> was guaranteed to return the same value on .borrow(). The borrowed index value was used to retrieve a mutable reference to a value.

If the Borrow<Idx> implementation returned a different index, the split arena would allow retrieving the index as a mutable reference creating two mutable references to the same element. This violates Rust's aliasing rules and allows for memory safety issues such as writing out of bounds and use-after-frees.

The flaw was corrected in commit 6b83f9d by storing the .borrow() value in a temporary variable.

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://crates.io/crates/nano_arena	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2021-0031.html	ADVISORY
	https://github.com/bennetthardwick/nano-arena/issues/1	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "nano_arena::Arena::split_at",
            "nano_arena::ArenaSplit::split_at"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "nano_arena",
        "purl": "pkg:cargo/nano_arena"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.5.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-28032",
    "GHSA-wp34-mqw5-jj85"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Affected versions of this crate assumed that `Borrow\u003cIdx\u003e` was guaranteed to\nreturn the same value on `.borrow()`. The borrowed index value was used to\nretrieve a mutable reference to a value.\n\nIf the `Borrow\u003cIdx\u003e` implementation returned a different index, the split arena\nwould allow retrieving the index as a mutable reference creating two mutable\nreferences to the same element. This violates Rust\u0027s aliasing rules and allows\nfor memory safety issues such as writing out of bounds and use-after-frees.\n\nThe flaw was corrected in commit `6b83f9d` by storing the `.borrow()` value in\na temporary variable.",
  "id": "RUSTSEC-2021-0031",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-01-31T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/nano_arena"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/bennetthardwick/nano-arena/issues/1"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "split_at allows obtaining multiple mutable references to the same data"
}

CVE-2021-28032 (GCVE-0-2021-28032)

Vulnerability from cvelistv5 – Published: 2021-03-05 08:40 – Updated: 2024-08-03 21:33

Summary

An issue was discovered in the nano_arena crate before 0.5.2 for Rust. There is an aliasing violation in split_at because two mutable references can exist for the same element, if Borrow<Idx> behaves in certain ways. This can have a resultant out-of-bounds write or use-after-free.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2166 records in the last 180 days details

References

1 reference

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2021-0031.html	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:33:17.226Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in the nano_arena crate before 0.5.2 for Rust. There is an aliasing violation in split_at because two mutable references can exist for the same element, if Borrow\u003cIdx\u003e behaves in certain ways. This can have a resultant out-of-bounds write or use-after-free."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-03-05T08:40:02.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-28032",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in the nano_arena crate before 0.5.2 for Rust. There is an aliasing violation in split_at because two mutable references can exist for the same element, if Borrow\u003cIdx\u003e behaves in certain ways. This can have a resultant out-of-bounds write or use-after-free."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html",
              "refsource": "MISC",
              "url": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-28032",
    "datePublished": "2021-03-05T08:40:02.000Z",
    "dateReserved": "2021-03-05T00:00:00.000Z",
    "dateUpdated": "2024-08-03T21:33:17.226Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-WP34-MQW5-JJ85

Vulnerability from github – Published: 2021-08-25 20:52 – Updated: 2023-06-13 20:02

Summary

Use after free in nano_arena

Details

Affected versions of this crate assumed that Borrow was guaranteed to return the same value on .borrow(). The borrowed index value was used to retrieve a mutable reference to a value.

If the Borrow implementation returned a different index, the split arena would allow retrieving the index as a mutable reference creating two mutable references to the same element. This violates Rust's aliasing rules and allows for memory safety issues such as writing out of bounds and use-after-frees.

The flaw was corrected in commit 6b83f9d by storing the .borrow() value in a temporary variable.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "nano_arena"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-28032"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T17:23:52Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "Affected versions of this crate assumed that Borrow\u003cIdx\u003e was guaranteed to return the same value on .borrow(). The borrowed index value was used to retrieve a mutable reference to a value.\n\nIf the Borrow\u003cIdx\u003e implementation returned a different index, the split arena would allow retrieving the index as a mutable reference creating two mutable references to the same element. This violates Rust\u0027s aliasing rules and allows for memory safety issues such as writing out of bounds and use-after-frees.\n\nThe flaw was corrected in commit `6b83f9d` by storing the .borrow() value in a temporary variable.",
  "id": "GHSA-wp34-mqw5-jj85",
  "modified": "2023-06-13T20:02:46Z",
  "published": "2021-08-25T20:52:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28032"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bennetthardwick/nano-arena/issues/1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bennetthardwick/nano-arena/commit/6b83f9d0708337a9f8b709c1624a8587021ceba2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bennetthardwick/nano-arena"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0031.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Use after free in nano_arena"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

RUSTSEC-2021-0031 (CVE-2021-28032)

CVE-2021-28032 (GCVE-0-2021-28032)

GHSA-WP34-MQW5-JJ85

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Vulnerability timeline

Related by attack behaviour