An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical session. This is related to daemon/Display.cpp and helper/backend/PamBackend.cpp.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade sddm | Jul 30, 2024 | Jul 17, 2018 |
| Freebsd | — | Upgrade sddm | Sep 12, 2018 | Sep 11, 2018 |
| Suse | — | Upgrade sddm-branding-upstreamUpgrade sddm-branding-openSUSEUpgrade sddm | Aug 14, 2018 | Jul 17, 2018 |
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