SB2019071711 - Security restrictions bypass in Python Engine.IO server
Published: July 17, 2019 Updated: January 30, 2020
Security Bulletin ID
SB2019071711
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Overly permissive cross-domain whitelist (CVE-ID: CVE-2019-13611)
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.
Remediation
Install update from vendor's website.