[USN-5069-2] mod-auth-mellon vulnerability

========================================================================== Ubuntu Security Notice USN-5069-2 September 08, 2021
libapache2-mod-auth-mellon vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.04
Summary:
mod-auth-mellon could be made to redirect to arbitrary sites.
Software Description: – libapache2-mod-auth-mellon: SAML 2.0 authentication module for Apache
Details:
USN-5069-1 fixed a vulnerability in mod-auth-mellon. This update provides the corresponding updates for Ubuntu 21.04.
Original advisory details:
It was discovered that mod-auth-mellon incorrectly filtered certain URLs. A remote attacker could possibly use this issue to perform an open redirect attack.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: libapache2-mod-auth-mellon 0.17.0-1ubuntu0.21.04.1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5069-2 ubuntu.com/security/notices/USN-5069-1 CVE-2021-3639
Package Information:
launchpad.net/ubuntu/+source/libapache2-mod-auth-mellon/0.17.0-1ubuntu0.21.04.1