SB2019032315 - Fedora 30 update for mod_auth_mellon
Published: March 23, 2019 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
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.
2) Open redirect (CVE-ID: CVE-2019-3877)
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data in the apr_uri_parse() function within the logout URL. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
Remediation
Install update from vendor's website.