Vulnerability-Lookup

RUSTSEC-2021-0121 (CVE-2021-45709)

Vulnerability from osv_rustsec – Published: 2021-10-08 12:00 – Updated: 2023-06-13 13:10 – Source website

Summary

Non-aligned u32 read in Chacha20 encryption and decryption

Details

The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to std::slice::from_raw_parts_mut, which breaks the contract and introduces undefined behavior.

This affects Chacha20 encryption and decryption in crypto2.

References

URL

Type

	https://crates.io/crates/crypto2	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2021-0121.html	ADVISORY
	https://github.com/shadowsocks/crypto2/issues/27	REPORT

JSON

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{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "crypto2::streamcipher::Chacha20::decrypt_slice",
            "crypto2::streamcipher::Chacha20::encrypt_slice",
            "crypto2::streamcipher::xor_si512_inplace"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "crypto2",
        "purl": "pkg:cargo/crypto2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-45709",
    "GHSA-9hfg-pxr6-q4vp",
    "GHSA-pmcv-mgcf-rvxg"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to `std::slice::from_raw_parts_mut`, which breaks the contract and introduces undefined behavior.\n\nThis affects Chacha20 encryption and decryption in crypto2.",
  "id": "RUSTSEC-2021-0121",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-10-08T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/crypto2"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/shadowsocks/crypto2/issues/27"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Non-aligned u32 read in Chacha20 encryption and decryption"
}

CVE-2021-45709 (GCVE-0-2021-45709)

Vulnerability from cvelistv5 – Published: 2021-12-26 21:47 – Updated: 2024-08-04 04:47

Summary

An issue was discovered in the crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2266 records in the last 180 days details

References

2 references

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2021-0121.html	x_refsource_MISC
https://raw.githubusercontent.com/rustsec/advisor…	x_refsource_MISC

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:47:02.019Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md"
          }
        ],
        "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 crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-12-26T21:47:32.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-45709",
          "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 crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html",
              "refsource": "MISC",
              "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html"
            },
            {
              "name": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md",
              "refsource": "MISC",
              "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-45709",
    "datePublished": "2021-12-26T21:47:32.000Z",
    "dateReserved": "2021-12-26T00:00:00.000Z",
    "dateUpdated": "2024-08-04T04:47:02.019Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-9HFG-PXR6-Q4VP

Vulnerability from github – Published: 2022-01-06 22:04 – Updated: 2023-06-13 17:23

Summary

Use of a Broken or Risky Cryptographic Algorithm in crypto2

Details

The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to std::slice::from_raw_parts_mut, which breaks the contract and introduces undefined behavior.

This affects Chacha20 encryption and decryption in crypto2.

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": "crypto2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-45709"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-05T22:55:41Z",
    "nvd_published_at": "2021-12-27T00:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to std::slice::from_raw_parts_mut, which breaks the contract and introduces undefined behavior.\n\nThis affects Chacha20 encryption and decryption in crypto2.",
  "id": "GHSA-9hfg-pxr6-q4vp",
  "modified": "2023-06-13T17:23:04Z",
  "published": "2022-01-06T22:04:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45709"
    },
    {
      "type": "WEB",
      "url": "https://github.com/shadowsocks/crypto2/issues/27"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/shadowsocks/crypto2"
    },
    {
      "type": "WEB",
      "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/crypto2/RUSTSEC-2021-0121.md"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.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 of a Broken or Risky Cryptographic Algorithm in crypto2"
}

GHSA-PMCV-MGCF-RVXG

Vulnerability from github – Published: 2022-06-16 23:51 – Updated: 2022-06-16 23:51

Summary

Non-aligned u32 read in Chacha20 encryption and decryption

Details

This affects Chacha20 encryption and decryption in crypto2.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "crypto2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2022-06-16T23:51:32Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to `std::slice::from_raw_parts_mut`, which breaks the contract and introduces undefined behavior.\n\nThis affects Chacha20 encryption and decryption in crypto2.\n",
  "id": "GHSA-pmcv-mgcf-rvxg",
  "modified": "2022-06-16T23:51:32Z",
  "published": "2022-06-16T23:51:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/shadowsocks/crypto2/issues/27"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/shadowsocks/crypto2"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0121.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Non-aligned u32 read in Chacha20 encryption and decryption"
}

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

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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.

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RUSTSEC-2021-0121 (CVE-2021-45709)

CVE-2021-45709 (GCVE-0-2021-45709)

GHSA-9HFG-PXR6-Q4VP

GHSA-PMCV-MGCF-RVXG

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour