Security restrictions bypass in Python Engine.IO server



| Updated: 2020-01-30
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-13611
CWE-ID CWE-942
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Python Engine.IO
Web applications / Other software

Vendor Miguel Grinberg

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Overly permissive cross-domain whitelist

EUVDB-ID: #VU19229

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13611

CWE-ID: CWE-942 - Overly Permissive Cross-domain Whitelist

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass the CORS protection mechanism.

The vulnerability exists due to incorrect processing of the "Origin" HTTP header that is supplied within HTTP request. A remote attacker can supply arbitrary value via the "Origin" HTTP header, bypass implemented CORS protection mechanism and perform Cross-Site WebSocket Hijacking (CSWSH) attacks against the vulnerable application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Python Engine.IO: 0.1.0 - 3.8.2

CPE2.3 External links

https://snyk.io/vuln/SNYK-PYTHON-PYTHONENGINEIO-451612


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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