USN-7872-1: Lasso vulnerabilities

Publication date

18 November 2025

Overview

Several security issues were fixed in Lasso.


Packages

  • lasso - Liberty Alliance and SAML protocol Library

Details

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could possibly use this issue to cause Lasso
to crash, resulting in a denial of service. (CVE-2025-46404)

It was discovered that Lasso incorrectly handled certain malformed SAML
assertion responses. A remote attacker could possibly use this issue to
cause Lasso to crash, resulting in a denial of service. (CVE-2025-46705)

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could possibly use this issue to cause Lasso
to consume memory, resulting in a denial of service. This issue only
affected Ubuntu 22.04 LTS. (CVE-2025-46784)

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could use this issue to cause Lasso to...

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could possibly use this issue to cause Lasso
to crash, resulting in a denial of service. (CVE-2025-46404)

It was discovered that Lasso incorrectly handled certain malformed SAML
assertion responses. A remote attacker could possibly use this issue to
cause Lasso to crash, resulting in a denial of service. (CVE-2025-46705)

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could possibly use this issue to cause Lasso
to consume memory, resulting in a denial of service. This issue only
affected Ubuntu 22.04 LTS. (CVE-2025-46784)

It was discovered that Lasso incorrectly handled certain malformed SAML
responses. A remote attacker could use this issue to cause Lasso to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2025-47151)


Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:


Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


Have additional questions?

Talk to a member of the team ›