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CVE-2019-13611

An issue was discovered in python-engineio through 3.8.2. There is a Cross-Site WebSocket Hijacking (CSWSH) vulnerability that allows attackers to make WebSocket connections to a server by using a victim's credentials, because the Origin header is not restricted.

GHSA-j3jp-gvr5-7hwq — python-engineio vulnerable to Cross-Site Request Forgery (CSRF)

Affected: PyPI: python-engineio

## WebSocket cross-origin vulnerability

### Impact This is a Cross-Site Request Forgery (CSRF) vulnerability. It affects Socket.IO and Engine.IO web servers that authenticate clients using cookies.

### Patches python-engineio version 3.9.0 patches this vulnerability by adding server-side Origin header checks.

### Workarounds Do not use cookies for client authentication, or else add a CSRF token to the connection URL.

### References https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF) https://www.christian-schneider.net/CrossSiteWebSocketHijacking.html

### For more information If you have any questions or comments about this advisory: * Open an issue in [python-engineio](http://github.com/miguelgrinberg/python-engineio)

PYSEC-2019-170

Affected: PyPI: python-engineio