Vulnerability-Lookup

rustsec-2020-0089

Vulnerability from osv_rustsec

Published

2020-12-09 12:00

Modified

2023-06-13 13:10

Summary

nanorand 0.5.0 - RNGs failed to generate properly for non-64-bit numbers

Details

In versions of nanorand prior to 0.5.1, RandomGen implementations for standard unsigned integers could fail to properly generate numbers, due to using bit-shifting to truncate a 64-bit number, rather than just an as conversion.

This often manifested as RNGs returning nothing but 0, including the cryptographically secure ChaCha random number generator..

Severity

5.1 (Medium)


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

References

URL

Type

	https://crates.io/crates/nanorand	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2020-0089.html	ADVISORY
	https://twitter.com/aspenluxxxy/status/1336684692…	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "crypto-failure"
        ],
        "cvss": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "nanorand",
        "purl": "pkg:cargo/nanorand"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.5.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2020-35926",
    "GHSA-m9m5-cg5h-r582"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "In versions of `nanorand` prior to 0.5.1, `RandomGen` implementations for standard unsigned integers could\nfail to properly generate numbers, due to using bit-shifting to truncate a 64-bit number, rather than just\nan `as` conversion.\n\nThis often manifested as RNGs returning nothing but 0, including the cryptographically secure `ChaCha` random\nnumber generator..",
  "id": "RUSTSEC-2020-0089",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2020-12-09T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/nanorand"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0089.html"
    },
    {
      "type": "WEB",
      "url": "https://twitter.com/aspenluxxxy/status/1336684692284772352"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nanorand 0.5.0 - RNGs failed to generate properly for non-64-bit numbers"
}

CVE-2020-35926 (GCVE-0-2020-35926)

Vulnerability from cvelistv5 – Published: 2020-12-31 08:16 – Updated: 2024-08-04 17:16

Summary

An issue was discovered in the nanorand crate before 0.5.1 for Rust. It caused any random number generator (even ChaCha) to return all zeroes because integer truncation was mishandled.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2020-0089.html	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T17:16:13.237Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2020-0089.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 nanorand crate before 0.5.1 for Rust. It caused any random number generator (even ChaCha) to return all zeroes because integer truncation was mishandled."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-31T08:16:30.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2020-0089.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-35926",
          "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": {
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              "value": "An issue was discovered in the nanorand crate before 0.5.1 for Rust. It caused any random number generator (even ChaCha) to return all zeroes because integer truncation was mishandled."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
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                  "lang": "eng",
                  "value": "n/a"
                }
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://rustsec.org/advisories/RUSTSEC-2020-0089.html",
              "refsource": "MISC",
              "url": "https://rustsec.org/advisories/RUSTSEC-2020-0089.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-35926",
    "datePublished": "2020-12-31T08:16:30.000Z",
    "dateReserved": "2020-12-31T00:00:00.000Z",
    "dateUpdated": "2024-08-04T17:16:13.237Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-M9M5-CG5H-R582

Vulnerability from github – Published: 2021-08-25 20:50 – Updated: 2023-06-13 20:01

Summary

Improper random number generation in nanorand

Details

In versions of nanorand prior to 0.5.1, RandomGen implementations for standard unsigned integers could fail to properly generate numbers, due to using bit-shifting to truncate a 64-bit number, rather than just an as conversion. This often manifested as RNGs returning nothing but 0, including the cryptographically secure ChaCha random number generator.

Severity

5.1 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "nanorand"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-35926"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T18:55:41Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "In versions of nanorand prior to 0.5.1, RandomGen implementations for standard unsigned integers could fail to properly generate numbers, due to using bit-shifting to truncate a 64-bit number, rather than just an as conversion. This often manifested as RNGs returning nothing but 0, including the cryptographically secure ChaCha random number generator.",
  "id": "GHSA-m9m5-cg5h-r582",
  "modified": "2023-06-13T20:01:40Z",
  "published": "2021-08-25T20:50:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35926"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Absolucy/nanorand-rs/commit/5ba218ac29df4786b002d7d12b47fa0c04a331f2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Absolucy/nanorand-rs"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0089.html"
    },
    {
      "type": "WEB",
      "url": "https://twitter.com/aspenluxxxy/status/1336684692284772352"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper random number generation in nanorand"
}

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.

Detection rules are retrieved from Rulezet.

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-2020-0089

Vulnerability from osv_rustsec

CVE-2020-35926 (GCVE-0-2020-35926)

GHSA-M9M5-CG5H-R582

Tags

Sightings

Nomenclature

Related by attack behaviour