UbuntuUSN-3285-1LightDM vulnerability
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
4.6 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.8%
Releases
- Ubuntu 17.04
- Ubuntu 16.10
Packages
- lightdm - Display Manager
Details
Tyler Hicks discovered that LightDM did not confine the user session for guest
users. An attacker with physical access could use this issue to access files
and other resources that they should not be able to access. In the default
installation, this includes files in the home directories of other users on the
system. This update fixes the issue by disabling the guest session. It may be
re-enabled in a future update. Please see the bug referenced below for
instructions on how to manually re-enable the guest session.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Ubuntu | 17.04 | noarch | lightdm | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | gir1.2-lightdm-1 | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-gobject-1-0 | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-gobject-1-0-dbgsym | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-gobject-1-dev | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-gobject-1-doc | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-qt-3-0 | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-qt-3-0-dbgsym | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-qt-dev | < 1.22.0-0ubuntu2.1 | UNKNOWN |
| Ubuntu | 17.04 | noarch | liblightdm-qt5-3-0 | < 1.22.0-0ubuntu2.1 | UNKNOWN |
Related
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
4.6 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.8%