CVE-2020-16125

2020-11-0300:00:00

ubuntu.com

gdm3

vulnerability

privilege escalation

dbus

accountservice

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS3

7.2

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS

0.001

Percentile

35.9%

JSON

gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if
gdm3 can’t contact the accountservice service via dbus in a timely manner;
on Ubuntu (and potentially derivatives) this could be be chained with an
additional issue that could allow a local user to create a new privileged
account.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchgdm3< 3.28.3-0ubuntu18.04.6UNKNOWN
ubuntu20.04noarchgdm3< 3.36.3-0ubuntu0.20.04.2UNKNOWN
ubuntu20.10noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu21.04noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu21.10noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu22.04noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu22.10noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu23.04noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu23.10noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN
ubuntu24.04noarchgdm3< 3.38.1-2ubuntu1.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	gdm3	< 3.28.3-0ubuntu18.04.6	UNKNOWN
ubuntu	20.04	noarch	gdm3	< 3.36.3-0ubuntu0.20.04.2	UNKNOWN
ubuntu	20.10	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	21.04	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	21.10	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	22.04	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	22.10	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	23.04	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	23.10	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN
ubuntu	24.04	noarch	gdm3	< 3.38.1-2ubuntu1.1	UNKNOWN