GHSA-3RH3-WFR4-76MJ
Vulnerability from github – Published: 2021-04-06 17:28 – Updated: 2021-04-30 17:30
VLAI?
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.
Severity ?
6.5 (Medium)
{
"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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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.
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