Vulnerability-Lookup

RUSTSEC-2021-0023 (CVE-2021-27378)

Vulnerability from osv_rustsec – Published: 2021-02-12 12:00 – Updated: 2023-06-13 13:10 – Source website

Summary

Incorrect check on buffer length when seeding RNGs

Details

Summary: rand_core::le::read_u32_into and read_u64_into have incorrect checks on the source buffer length, allowing the destination buffer to be under-filled.

Implications: some downstream RNGs, including Hc128Rng (but not the more widely used ChaCha*Rng), allow seeding using the SeedableRng::from_seed trait-function with too short keys.

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/rand_core	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2021-0023.html	ADVISORY
	https://github.com/rust-random/rand/pull/1096	WEB

JSON

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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "crypto-failure"
        ],
        "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": [
            "rand_core::le::read_u32_into",
            "rand_core::le::read_u64_into"
          ],
          "os": []
        }
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  "aliases": [
    "CVE-2021-27378",
    "GHSA-w7j2-35mf-95p7"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Summary: rand_core::le::read_u32_into and read_u64_into have incorrect checks on the source buffer length, allowing the destination buffer to be under-filled.\n\nImplications: some downstream RNGs, including Hc128Rng (but not the more widely used ChaCha*Rng), allow seeding using the SeedableRng::from_seed trait-function with too short keys.",
  "id": "RUSTSEC-2021-0023",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-02-12T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/rand_core"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0023.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-random/rand/pull/1096"
    }
  ],
  "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": "Incorrect check on buffer length when seeding RNGs"
}

CVE-2021-27378 (GCVE-0-2021-27378)

Vulnerability from cvelistv5 – Published: 2021-02-18 03:35 – Updated: 2024-08-03 20:48

Summary

An issue was discovered in the rand_core crate before 0.6.2 for Rust. Because read_u32_into and read_u64_into mishandle certain buffer-length checks, a random number generator may be seeded with too little data.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2021-0023.html	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0023.html"
          }
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        "title": "CVE Program Container"
      }
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GHSA-W7J2-35MF-95P7

Vulnerability from github – Published: 2021-08-25 20:52 – Updated: 2022-07-13 20:03

Summary

Incorrect check on buffer length in rand_core

Details

An issue was discovered in the rand_core crate before 0.6.2 for Rust. Because read_u32_into and read_u64_into mishandle certain buffer-length checks, a random number generator may be seeded with too little data. The vulnerability was introduced in v0.6.0. The advisory doesn't apply to earlier minor version numbers.

Because read_u32_into and read_u64_into mishandle certain buffer-length checks, a random number generator may be seeded with too little data.

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": "rand_core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.6.0"
            },
            {
              "fixed": "0.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-27378"
  ],
  "database_specific": {
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      "CWE-330"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T17:35:01Z",
    "nvd_published_at": "2021-02-18T04:15:00Z",
    "severity": "CRITICAL"
  },
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  "id": "GHSA-w7j2-35mf-95p7",
  "modified": "2022-07-13T20:03:17Z",
  "published": "2021-08-25T20:52:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27378"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-random/rand/pull/1096"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rust-random/rand"
    },
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      "type": "WEB",
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    },
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      "type": "WEB",
      "url": "https://github.com/rust-random/rand/compare/0.6.0...rand_core-0.6.2#diff-f41b3dfa5ce28f3bee390d327c50621e141cf3569921f8e9ca15ccfcf25263a9R28"
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      "type": "CVSS_V3"
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  "summary": "Incorrect check on buffer length in rand_core"
}

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.

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-2021-0023 (CVE-2021-27378)

CVE-2021-27378 (GCVE-0-2021-27378)

GHSA-W7J2-35MF-95P7

Tags

Sightings

Nomenclature

Related by attack behaviour