Vulnerability-Lookup

RUSTSEC-2021-0076 (CVE-2021-38195)

Vulnerability from osv_rustsec – Published: 2021-07-13 12:00 – Updated: 2023-06-13 13:10 – Source website

Summary

libsecp256k1 allows overflowing signatures

Details

libsecp256k1 accepts signatures whose R or S parameter is larger than the secp256k1 curve order, which differs from other implementations. This could lead to invalid signatures being verified.

The error is resolved in 0.5.0 by adding a check_overflow flag.

References

URL

Type

	https://crates.io/crates/libsecp256k1	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2021-0076.html	ADVISORY
	https://github.com/paritytech/libsecp256k1/pull/67	WEB

JSON

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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "crypto-failure"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "libsecp256k1",
        "purl": "pkg:cargo/libsecp256k1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.5.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-38195",
    "GHSA-g4vj-x7v9-h82m"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "libsecp256k1 accepts signatures whose R or S parameter is larger than the\nsecp256k1 curve order, which differs from other implementations. This could\nlead to invalid signatures being verified.\n\nThe error is resolved in 0.5.0 by adding a `check_overflow` flag.",
  "id": "RUSTSEC-2021-0076",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-07-13T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/libsecp256k1"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0076.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/paritytech/libsecp256k1/pull/67"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "libsecp256k1 allows overflowing signatures"
}

CVE-2021-38195 (GCVE-0-2021-38195)

Vulnerability from cvelistv5 – Published: 2021-08-08 05:07 – Updated: 2024-08-04 01:37

Summary

An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2021-0076.html	x_refsource_MISC
https://raw.githubusercontent.com/rustsec/advisor…	x_refsource_MISC

Show details on NVD website

JSON

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{
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          }
        ],
        "title": "CVE Program Container"
      }
    ],
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GHSA-G4VJ-X7V9-H82M

Vulnerability from github – Published: 2021-08-25 20:56 – Updated: 2021-08-18 21:20

Summary

Overflow in libsecp256k1

Details

An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.

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": "libsecp256k1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-38195"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190",
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-18T21:20:32Z",
    "nvd_published_at": "2021-08-08T06:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.",
  "id": "GHSA-g4vj-x7v9-h82m",
  "modified": "2021-08-18T21:20:32Z",
  "published": "2021-08-25T20:56:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38195"
    },
    {
      "type": "WEB",
      "url": "https://github.com/paritytech/libsecp256k1/pull/67"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/paritytech/libsecp256k1"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0076.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": "Overflow in libsecp256k1"
}

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-2021-0076 (CVE-2021-38195)

CVE-2021-38195 (GCVE-0-2021-38195)

GHSA-G4VJ-X7V9-H82M

Tags

Sightings

Nomenclature

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