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Test ID:1.3.6.1.4.1.25623.1.0.844499
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory for snapd (USN-4424-1)
Summary:The remote host is missing an update for the 'snapd'; package(s) announced via the USN-4424-1 advisory.
Description:Summary:
The remote host is missing an update for the 'snapd'
package(s) announced via the USN-4424-1 advisory.

Vulnerability Insight:
It was discovered that cloud-init as managed by snapd on Ubuntu Core 16
and Ubuntu Core 18 devices ran on every boot without restrictions. A
physical attacker could exploit this to craft cloud-init
user-data/meta-data via external media to perform arbitrary changes on
the device to bypass intended security mechanisms such as full disk
encryption. This issue did not affect traditional Ubuntu systems.
(CVE-2020-11933)

It was discovered that snapctl user-open allowed altering the
XDG_DATA_DIRS environment variable when calling the system xdg-open. A
malicious snap could exploit this to bypass intended access restrictions
to control how the host system xdg-open script opens the URL. This issue
did not affect Ubuntu Core systems. (CVE-2020-11934)

Affected Software/OS:
'snapd' package(s) on Ubuntu 20.04 LTS, Ubuntu 19.10, Ubuntu 18.04 LTS, Ubuntu 16.04 LTS.

Solution:
Please install the updated package(s).

CVSS Score:
4.6

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-11933
Common Vulnerability Exposure (CVE) ID: CVE-2020-11934
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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