Vulnerability-Lookup

rustsec-2021-0063

Vulnerability from osv_rustsec

Published

2021-05-04 12:00

Modified

2023-06-13 13:10

Summary

XSS in `comrak`

Details

comrak operates by default in a "safe" mode of operation where unsafe content, such as arbitrary raw HTML or URLs with non-standard schemes, are not permitted in the output. This is per the reference GFM implementation, cmark-gfm.

Ampersands were not being correctly escaped in link targets, making it possible to fashion unsafe URLs using schemes like data: or javascript: by entering them as HTML entities, e.g. data:. The intended behaviour, demonstrated upstream, is that these should be escaped and therefore harmless, but this behaviour was broken in comrak.

References

URL

Type

	https://crates.io/crates/comrak	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2021-0063.html	ADVISORY
	https://github.com/kivikakk/comrak/releases/tag/0.10.1	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "format-injection"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "comrak",
        "purl": "pkg:cargo/comrak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.10.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-38186",
    "GHSA-6wj2-g87r-pm62"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "[comrak](https://github.com/kivikakk/comrak) operates by default in a \"safe\"\nmode of operation where unsafe content, such as arbitrary raw HTML or URLs with\nnon-standard schemes, are not permitted in the output.  This is per the\nreference GFM implementation, [cmark-gfm](https://github.com/github/cmark).\n\nAmpersands were not being correctly escaped in link targets, making it possible\nto fashion unsafe URLs using schemes like `data:` or `javascript:` by entering\nthem as HTML entities, e.g. `\u0026#x64\u0026#x61\u0026#x74\u0026#x61\u0026#x3a`.  The intended\nbehaviour, demonstrated upstream, is that these should be escaped and therefore\nharmless, but this behaviour was broken in comrak.",
  "id": "RUSTSEC-2021-0063",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-05-04T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/comrak"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/releases/tag/0.10.1"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "XSS in `comrak`"
}

CVE-2021-38186 (GCVE-0-2021-38186)

Vulnerability from cvelistv5 – Published: 2021-08-08 05:10 – Updated: 2024-08-04 01:37

Summary

An issue was discovered in the comrak crate before 0.10.1 for Rust. It mishandles & characters, leading to XSS via &# HTML entities.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2021-0063.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": "2024-08-04T01:37:15.492Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/comrak/RUSTSEC-2021-0063.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 comrak crate before 0.10.1 for Rust. It mishandles \u0026 characters, leading to XSS via \u0026# HTML entities."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-08T05:10:53.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/comrak/RUSTSEC-2021-0063.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-38186",
          "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 comrak crate before 0.10.1 for Rust. It mishandles \u0026 characters, leading to XSS via \u0026# HTML entities."
            }
          ]
        },
        "problemtype": {
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            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html",
              "refsource": "MISC",
              "url": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html"
            },
            {
              "name": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/comrak/RUSTSEC-2021-0063.md",
              "refsource": "MISC",
              "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/comrak/RUSTSEC-2021-0063.md"
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
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    "datePublished": "2021-08-08T05:10:53.000Z",
    "dateReserved": "2021-08-08T00:00:00.000Z",
    "dateUpdated": "2024-08-04T01:37:15.492Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-6WJ2-G87R-PM62

Vulnerability from github – Published: 2021-08-25 20:55 – Updated: 2021-08-18 21:33

Summary

Cross-site Scripting in comrak

Details

An issue was discovered in the comrak crate before 0.10.1 for Rust. It mishandles & characters, leading to XSS via &# HTML entities.

Severity

6.1 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "comrak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-38186"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-18T21:33:18Z",
    "nvd_published_at": "2021-08-08T06:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in the comrak crate before 0.10.1 for Rust. It mishandles \u0026 characters, leading to XSS via \u0026# HTML entities.",
  "id": "GHSA-6wj2-g87r-pm62",
  "modified": "2021-08-18T21:33:18Z",
  "published": "2021-08-25T20:55:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38186"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/commit/b72340cabe4749952530b4fb6b4fcc706bc973e5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kivikakk/comrak"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/compare/0.10.0...0.10.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/releases/tag/0.10.1"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0063.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cross-site Scripting in comrak"
}

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-2021-0063

Vulnerability from osv_rustsec

CVE-2021-38186 (GCVE-0-2021-38186)

GHSA-6WJ2-G87R-PM62

Tags

Sightings

Nomenclature

Related by attack behaviour