Ubuntu Security Notice 5069-2 - USN-5069-1 fixed a vulnerability in mod-auth-mellon. This update provides the corresponding updates for Ubuntu 21.04. 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. Various other issues were also addressed.
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Ubuntu Security Notice USN-5069-2
September 08, 2021
libapache2-mod-auth-mellon vulnerability
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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:
https://ubuntu.com/security/notices/USN-5069-2
https://ubuntu.com/security/notices/USN-5069-1
CVE-2021-3639
Package Information:
https://launchpad.net/ubuntu/+source/libapache2-mod-auth-mellon/0.17.0-1ubuntu0.21.04.1