GHSA-3fw8-66wf-pr7m

Suggest an improvement
Source
https://github.com/advisories/GHSA-3fw8-66wf-pr7m
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/08/GHSA-3fw8-66wf-pr7m/GHSA-3fw8-66wf-pr7m.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-3fw8-66wf-pr7m
Aliases
Published
2020-08-31T22:41:27Z
Modified
2023-11-08T03:57:28.815077Z
Summary
methodOverride Middleware Reflected Cross-Site Scripting in connect
Details

Connect is a stack of middleware that is executed in order in each request.

The "methodOverride" middleware allows the http post to override the method of the request with the value of the "_method" post key or with the header "x-http-method-override".

Because the user post input was not checked, req.method could contain any kind of value. Because the req.method did not match any common method VERB, connect answered with a 404 page containing the "Cannot [method] [url]" content. The method was not properly encoded for output in the browser.

Example:

~ curl "localhost:3000" -d "_method=<script src=http://nodesecurity.io/xss.js></script>"
Cannot <SCRIPT SRC=HTTP://NODESECURITY.IO/XSS.JS></SCRIPT> /

Recommendation

Update to the newest version of Connect or disable methodOverride. It is not possible to avoid the vulnerability if you have enabled this middleware in the top of your stack.

Database specific 
{
    "github_reviewed_at": "2020-08-31T18:07:25Z",
    "nvd_published_at": null,
    "severity": "LOW",
    "cwe_ids": [
        "CWE-79"
    ],
    "github_reviewed": true
}
References

Affected packages

npm / connect

Package

Name
connect
View open source insights on deps.dev
Purl
pkg:npm/connect

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.8.1

Database specific

last_known_affected_version_range 
"<= 2.8.0"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/08/GHSA-3fw8-66wf-pr7m/GHSA-3fw8-66wf-pr7m.json"