GHSA-5R3X-P7XX-X6Q5

Vulnerability from github – Published: 2023-03-28 14:45 – Updated: 2023-03-28 23:08
VLAI
Summary
Comrak AST node data is not validated (GHSL-2023-049)
Details

Impact

A Comrak AST can be constructed manually by a program instead of parsing a Markdown document with parse_document. This AST can then be converted to HTML via html::format_document_with_plugins. However, the HTML formatting code assumes that the AST is well-formed. For example, many AST notes contain [u8] fields which the formatting code assumes is valid UTF-8 data. Several bugs can be triggered if this is not the case.

Patches

0.17.0 contains adjustments to the AST, storing strings instead of unvalidated byte arrays.

Workarounds

  • Validate UTF-8 correctness of all data when assigning to &[u8] and Vec<u8> fields in the AST.

References

n/a

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "comrak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.17.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-28631"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-755"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-28T14:45:28Z",
    "nvd_published_at": "2023-03-28T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nA Comrak AST can be constructed manually by a program instead of parsing a Markdown document with `parse_document`. This AST can then be converted to HTML via `html::format_document_with_plugins`. However, the HTML formatting code assumes that the AST is well-formed. For example, many AST notes contain `[u8]` fields which the formatting code assumes is valid UTF-8 data. Several bugs can be triggered if this is not the case.\n\n### Patches\n\n0.17.0 contains adjustments to the AST, storing strings instead of unvalidated byte arrays.\n\n### Workarounds\n\n* Validate UTF-8 correctness of all data when assigning to `\u0026[u8]` and `Vec\u003cu8\u003e` fields in the AST.\n\n### References\nn/a",
  "id": "GHSA-5r3x-p7xx-x6q5",
  "modified": "2023-03-28T23:08:47Z",
  "published": "2023-03-28T14:45:28Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/security/advisories/GHSA-5r3x-p7xx-x6q5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28631"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/commit/9ff5f8df0ac951f5742d22a72c39b89a15f56639"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kivikakk/comrak"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kivikakk/comrak/releases/tag/0.17.0"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OUYME2VA555X6567H7ORIJQFN4BVGT6N"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PTWZWCT7KCX2KTXTLPUYZ3EHOONG4X46"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VQ3UBC7LE4VPCMZBTADIBL353CH7CPVV"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Comrak AST node data is not validated (GHSL-2023-049)"
}



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