ghsa-3rh3-wfr4-76mj
Vulnerability from github
Published
2021-04-06 17:28
Modified
2021-04-30 17:30
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
Regular expression Denial of Service in multiple packages
Details

Impact

A regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0.

Patches

The problem has been recognized and patched. The fix will be available in version 27.0.0.

For more information

Email us at security@cksource.com if you have any questions or comments about this advisory.

Acknowledgements

The CKEditor 5 team would like to thank Yeting Li for recognizing and reporting these vulnerabilities.

Show details on source website

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-engine"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-font"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-image"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-list"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-markdown-gfm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-media-embed"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-paste-from-office"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 26.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@ckeditor/ckeditor5-widget"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "27.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21391"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-03-31T18:37:46Z",
    "nvd_published_at": "2021-04-29T01:15:00Z",
    "severity": "MODERATE"
  },
  "details": "\n### Impact\nA regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version \u003c= 26.0.0.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version 27.0.0.\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.\n\n### Acknowledgements\nThe CKEditor 5 team would like to thank Yeting Li for recognizing and reporting these vulnerabilities.",
  "id": "GHSA-3rh3-wfr4-76mj",
  "modified": "2021-04-30T17:30:42Z",
  "published": "2021-04-06T17:28:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21391"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ckeditor/ckeditor5/releases/tag/v27.0.0"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-engine"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-font"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-image"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-list"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-widget"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Regular expression Denial of Service in multiple packages"
}


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