Ubuntu 4974-1: Lasso vulnerability

Advisories

==========================================================================
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:
  https://ubuntu.com/security/notices/USN-4974-1
  CVE-2021-28091

Package Information:
  https://launchpad.net/ubuntu/+source/lasso/2.6.1-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu2.1
  https://launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu1.2
  https://launchpad.net/ubuntu/+source/lasso/2.5.1-0ubuntu1.2

Ubuntu 4974-1: Lasso vulnerability

June 1, 2021

Summary

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

https://ubuntu.com/security/notices/USN-4974-1

CVE-2021-28091

Severity
Ubuntu Security Notice USN-4974-1

Package Information

https://launchpad.net/ubuntu/+source/lasso/2.6.1-2ubuntu0.1 https://launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu2.1 https://launchpad.net/ubuntu/+source/lasso/2.6.0-7ubuntu1.2 https://launchpad.net/ubuntu/+source/lasso/2.5.1-0ubuntu1.2

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