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Ubuntu 25.04 Lasso Critical Denial of Service Vulnerabilities USN-7872-1

ubuntu
Calendar Grey November 18, 2025
Dist Ubuntu Esm H88
Ensure your Ubuntu system is secure by addressing critical Lasso issues affecting multiple releases urgently.
Several security issues were fixed in Lasso.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.04 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in Lasso. Software Description: - 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 ha...

Read the Full Advisory

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.04 liblasso-perl 2.8.2-8ubuntu0.1 liblasso3t64 2.8.2-8ubuntu0.1 python3-lasso 2.8.2-8ubuntu0.1 Ubuntu 24.04 LTS liblasso-perl 2.8.2-2ubuntu0.1 liblasso3t64 2.8.2-2ubuntu0.1 python3-lasso 2.8.2-2ubuntu0.1 Ubuntu 22.04 LTS liblasso-perl 2.7.0-2ubuntu0.1 liblasso3 2.7.0-2ubuntu0.1 python3-lasso 2.7.0-2ubuntu0.1 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7872-1

CVE-2025-46404, CVE-2025-46705, CVE-2025-46784, CVE-2025-47151

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7872-1

Package Information

https://launchpad.net/ubuntu/+source/lasso/2.8.2-8ubuntu0.1 https://launchpad.net/ubuntu/+source/lasso/2.8.2-2ubuntu0.1 https://launchpad.net/ubuntu/+source/lasso/2.7.0-2ubuntu0.1

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