Vulnerability-Lookup

rustsec-2021-0077

Vulnerability from osv_rustsec

Published

2021-07-22 12:00

Modified

2023-06-13 13:10

Summary

`better-macro` has deliberate RCE to prove a point

Details

better-macro is a fake crate which is "Proving A Point" that proc-macros can run arbitrary code. This is not a particularly novel or interesting observation.

It currently opens https://github.com/raycar5/better-macro/blob/master/doc/hi.md which doesn't appear to have any malicious content, but there's no guarantee that will remain the case.

This crate has no useful functionality, and should not be used.

JSON

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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "code-execution"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "better_macro::println"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "better-macro",
        "purl": "pkg:cargo/better-macro"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-38196",
    "GHSA-79wf-qcqv-r22r"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "[better-macro](https://crates.io/crates/better-macro) is a fake crate which is\n\"Proving A Point\" that proc-macros can run arbitrary code. This is not a particularly\nnovel or interesting observation.\n\nIt currently opens `https://github.com/raycar5/better-macro/blob/master/doc/hi.md`\nwhich doesn\u0027t appear to have any malicious content, but there\u0027s no guarantee that\nwill remain the case.\n\nThis crate has no useful functionality, and should not be used.",
  "id": "RUSTSEC-2021-0077",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-07-22T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/better-macro"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0077.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/raycar5/better-macro/blob/24ff1702397b9c19bbfa4c660e2316cd77d3b900/src/lib.rs#L36-L38"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`better-macro` has deliberate RCE to prove a point"
}

GHSA-79WF-QCQV-R22R

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

Summary

Remote code execution in better-macro

Details

An issue was discovered in the better-macro crate through 2021-07-22 for Rust. It intentionally demonstrates that remote attackers can execute arbitrary code via proc-macros, and otherwise has no legitimate purpose.

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": "better-macro"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-38196"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-18T21:21:03Z",
    "nvd_published_at": "2021-08-08T06:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in the better-macro crate through 2021-07-22 for Rust. It intentionally demonstrates that remote attackers can execute arbitrary code via proc-macros, and otherwise has no legitimate purpose.",
  "id": "GHSA-79wf-qcqv-r22r",
  "modified": "2021-08-18T21:21:03Z",
  "published": "2021-08-25T20:56:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38196"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/raycar5/better-macro"
    },
    {
      "type": "WEB",
      "url": "https://github.com/raycar5/better-macro/blob/24ff1702397b9c19bbfa4c660e2316cd77d3b900/src/lib.rs#L36-L38"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0077.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": "Remote code execution in better-macro"
}

CVE-2021-38196 (GCVE-0-2021-38196)

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

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://rustsec.org/advisories/RUSTSEC-2021-0077.html	x_refsource_MISC
	https://raw.githubusercontent.com/rustsec/advisor…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:37:16.252Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0077.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/better-macro/RUSTSEC-2021-0077.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 better-macro crate through 2021-07-22 for Rust. It intentionally demonstrates that remote attackers can execute arbitrary code via proc-macros, and otherwise has no legitimate purpose."
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-08T05:07:14",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
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          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2021-0077.html"
        },
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          ],
          "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/better-macro/RUSTSEC-2021-0077.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-38196",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
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                      "version": {
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        "data_format": "MITRE",
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        "data_version": "4.0",
        "description": {
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        "references": {
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            },
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "datePublished": "2021-08-08T05:07:14",
    "dateReserved": "2021-08-08T00:00:00",
    "dateUpdated": "2024-08-04T01:37:16.252Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

rustsec-2021-0077

Vulnerability from osv_rustsec

GHSA-79WF-QCQV-R22R

CVE-2021-38196 (GCVE-0-2021-38196)

Tags

Sightings

Nomenclature