SB2019050728 - Red Hat Enterprise Linux 8 update for mod_auth_mellon
Published: May 7, 2019 Updated: April 24, 2025
Security Bulletin ID
SB2019050728
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) Improper Authentication (CVE-ID: CVE-2019-3878)
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing certain headers. A remote attacker can add special HTTP headers that are normally used to start the special SAML ECP, bypass authentication process and gain unauthorized access to the application.
Successful exploitation of the vulnerability requires that Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users.
Remediation
Install update from vendor's website.