gsd-2021-28834
Vulnerability from gsd
Modified
2021-03-29 00:00
Details
Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.
Aliases
Aliases
CVE-2021-28834


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-28834",
    "description": "Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.",
    "id": "GSD-2021-28834",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-28834.html",
      "https://www.debian.org/security/2021/dsa-4890",
      "https://security.archlinux.org/CVE-2021-28834"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "kramdown",
            "purl": "pkg:gem/kramdown"
          }
        }
      ],
      "aliases": [
        "CVE-2021-28834",
        "GHSA-52p9-v744-mwjj"
      ],
      "details": "Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters\nnamespace, and thus arbitrary classes can be instantiated.\n",
      "id": "GSD-2021-28834",
      "modified": "2021-03-29T00:00:00.000Z",
      "published": "2021-03-29T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://github.com/advisories/GHSA-52p9-v744-mwjj"
        },
        {
          "type": "WEB",
          "url": "https://github.com/gettalong/kramdown/pull/708"
        },
        {
          "type": "WEB",
          "url": "https://about.gitlab.com/releases/2021/03/17/security-release-gitlab-13-9-4-released/#remote-code-execution-via-unsafe-user-controlled-markdown-rendering-options"
        }
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 9.8,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Remote code execution in Kramdown"
    }
  },
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        "ID": "CVE-2021-28834",
        "STATE": "PUBLIC"
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          },
          {
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            "refsource": "MISC",
            "url": "https://github.com/gettalong/kramdown/compare/REL_2_3_0...REL_2_3_1"
          },
          {
            "name": "FEDORA-2021-139a6a2f9d",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S3BBLUIDCUUR3NEE4NJLOCCAV3ALQ3O6/"
          },
          {
            "name": "FEDORA-2021-4c57a892d1",
            "refsource": "FEDORA",
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          },
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          },
          {
            "name": "DSA-4890",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2021/dsa-4890"
          }
        ]
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2021-28834",
      "cvss_v3": 9.8,
      "date": "2021-03-29",
      "description": "Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters\nnamespace, and thus arbitrary classes can be instantiated.\n",
      "gem": "kramdown",
      "ghsa": "52p9-v744-mwjj",
      "patched_versions": [
        "\u003e= 2.3.1"
      ],
      "related": {
        "url": [
          "https://github.com/gettalong/kramdown/pull/708",
          "https://about.gitlab.com/releases/2021/03/17/security-release-gitlab-13-9-4-released/#remote-code-execution-via-unsafe-user-controlled-markdown-rendering-options"
        ]
      },
      "title": "Remote code execution in Kramdown",
      "unaffected_versions": [
        "\u003c 1.16.0"
      ],
      "url": "https://github.com/advisories/GHSA-52p9-v744-mwjj"
    },
    "gitlab.com": {
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          "affected_range": "\u003c2.3.1",
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          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2021-04-19",
          "description": "Kramdown does not restrict Rouge formatters to the `Rouge::Formatters` namespace, and thus arbitrary classes can be instantiated.",
          "fixed_versions": [
            "2.3.1"
          ],
          "identifier": "CVE-2021-28834",
          "identifiers": [
            "CVE-2021-28834"
          ],
          "not_impacted": "All versions starting from 2.3.1",
          "package_slug": "gem/kramdown",
          "pubdate": "2021-03-19",
          "solution": "Upgrade to version 2.3.1 or above.",
          "title": "Code Injection",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-28834"
          ],
          "uuid": "2ffcaeb9-2d87-49b9-879d-edc000ac0988"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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                "cpe23Uri": "cpe:2.3:a:kramdown_project:kramdown:*:*:*:*:*:ruby:*:*",
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                "versionEndExcluding": "2.3.1",
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              }
            ],
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2021-04-19T20:39Z",
      "publishedDate": "2021-03-19T07:15Z"
    }
  }
}


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