SB2021031015 - Host HTTP header poisoning in October CMS
Published: March 10, 2021
Security Bulletin ID
SB2021031015
Severity
Medium
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) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-21265)
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. If the server is configured to accept requests with arbitrary HOST header, a remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers into the request.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
Remediation
Install update from vendor's website.