CVE-2020-11934

It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2.

CVSS v3 5.9 MEDIUM
CVSS v2.0 1.9 LOW

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

1.9^/10

CVSS v2.0 : LOW

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

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://launchpad.net/bugs/1880085	Third Party Advisory
https://ubuntu.com/USN-4424-1	Vendor Advisory
https://launchpad.net/bugs/1880085	Third Party Advisory
https://ubuntu.com/USN-4424-1	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::

History

21 Nov 2024, 04:58

Type	Values Removed	Values Added
References	~~() https://launchpad.net/bugs/1880085 - Third Party Advisory~~	() https://launchpad.net/bugs/1880085 - Third Party Advisory
References	~~() https://ubuntu.com/USN-4424-1 - Vendor Advisory~~	() https://ubuntu.com/USN-4424-1 - Vendor Advisory

Information

Published : 2020-07-29 17:15

Updated : 2024-11-21 04:58

NVD link : CVE-2020-11934

Mitre link : CVE-2020-11934

CVE.ORG link : CVE-2020-11934

JSON object : View

Products Affected

canonical

ubuntu_linux

CWE

CWE-668

Exposure of Resource to Wrong Sphere

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