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Alerts This Week
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Ubuntu 25.04: PAM High Access Risk Spoofing Vulnerability USN-7761-1

ubuntu
Calendar Grey September 22, 2025
Dist Ubuntu Esm H88
A serious vulnerability in PAM could enable hostname spoofing, putting access controls at risk on Ubuntu installations that require updates.
PAM could allow unintended access to network services.

Summary

PAM could allow unintended access to network services.

Software Description:

- pam: Pluggable Authentication Modules

Details:

It was discovered that the PAM pam_access module incorrectly parsed

certain rules as hostnames. An attacker could possibly use this issue to

spoof hostnames and bypass access restrictions.

Topics%20covered

Topics Covered

security advisory Ubuntu high PAM spoofing access restriction

Update Instructions

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

Ubuntu 25.04
  libpam-modules                  1.5.3-7ubuntu4.4

Ubuntu 24.04 LTS
  libpam-modules                  1.5.3-5ubuntu5.5

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

https://ubuntu.com/security/notices/USN-7761-1

CVE-2024-10963

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7761-1

Topics%20covered

Topics Covered

security advisory Ubuntu high PAM spoofing access restriction

Package Information

https://launchpad.net/ubuntu/+source/pam/1.5.3-7ubuntu4.4
https://launchpad.net/ubuntu/+source/pam/1.5.3-5ubuntu5.5

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