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QSN-8688-1: PAM vulnerability

August 27, 2026

Summary

A system hardening measure could be bypassed.

Details

Juthawong Naisanguansee discovered that PAM incorrectly cleared failed login attempt records when certain services invoked the account phase without first performing authentication. An attacker could possibly use this issue to reset failed login counters, resulting in authentication lockout restrictions being bypassed.

Affected QuantaStor releases

ReleasePlatformPackageExposureShipped versionFixed versionStatus
6.9.1.001Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.1.001Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.1.001Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.1.001Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.0.464Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.0.464Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.0.464Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.9.0.464Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.6.015Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.6.015Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.6.015Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.6.015Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibpam-modulesInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibpam-modules-binInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibpam-runtimeInternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibpam0gExternally-facing1.4.0-11ubuntu2.41.4.0-11ubuntu2.8Fixed by QuantaStor security update

Internally-facing: only accessible when logged into the QuantaStor console/ssh as the qadmin administrative sudo user; generally lower priority. Externally-facing: part of a service the storage platform presents on the network (or the kernel), so potentially reachable over the network.

References

https://ubuntu.com/security/notices/USN-8688-1

https://launchpad.net/bugs/2164901

Update

Fixes marked Fixed by QuantaStor security update are applied by upgrading QuantaStor with security patches included (Upgrade Manager). Fixed package versions:

PlatformPackageVersion
bionicpam1.1.8-3.6ubuntu2.18.04.6+esm2
Ubuntu 20.04 LTSpam1.3.1-5ubuntu4.7+esm1
Ubuntu 22.04 LTSpam1.4.0-11ubuntu2.8
Ubuntu 24.04 LTSpam1.5.3-5ubuntu5.7