[USN-4974-1] Lasso vulnerability

========================================================================== Ubuntu Security Notice USN-4974-1 June 02, 2021
lasso vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.04 – Ubuntu 20.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Applications using Lasso could be made to allow unintended access.
Software Description: – lasso: Liberty Alliance and SAML protocol Library
Details:
It was discovered that Lasso did not properly verify that all assertions in a SAML response were properly signed. An attacker could possibly use this to impersonate users or otherwise bypass access controls.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: liblasso-perl 2.6.1-2ubuntu0.1 liblasso3 2.6.1-2ubuntu0.1 python3-lasso 2.6.1-2ubuntu0.1
Ubuntu 20.10: liblasso-perl 2.6.0-7ubuntu2.1 liblasso3 2.6.0-7ubuntu2.1 python3-lasso 2.6.0-7ubuntu2.1
Ubuntu 20.04 LTS: liblasso-perl 2.6.0-7ubuntu1.2 liblasso3 2.6.0-7ubuntu1.2 python3-lasso 2.6.0-7ubuntu1.2
Ubuntu 18.04 LTS: liblasso-perl 2.5.1-0ubuntu1.2 liblasso3 2.5.1-0ubuntu1.2 python-lasso 2.5.1-0ubuntu1.2 python3-lasso 2.5.1-0ubuntu1.2
After a standard system update you need to restart applications that use Lasso to make all the necessary changes.
References: ubuntu.com/security/notices/USN-4974-1 CVE-2021-28091
Package Information: launchpad.net/ubuntu/+source/lasso/2.6.1-2ubuntu0.1 launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu2.1 launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu1.2 launchpad.net/ubuntu/+source/lasso/2.5.1-0ubuntu1.2