Alpine: singularity: security update to 3.6.3-r0 (deprecated)

critical Tenable Cloud Security Plugin ID 400318

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due
to insecure handling of path traversal and the lack of path sanitization within `unsquashfs`, it is
possible to overwrite/create any files on the host filesystem during the extraction with a crafted
squashfs filesystem. The extraction occurs automatically for unprivileged (either installation or with
`allow setuid = no`) run of Singularity when a user attempt to run an image which is a local SIF image or
a single file containing a squashfs filesystem and is coming from remote sources `library://` or
`shub://`. Image build is also impacted in a more serious way as it can be used by a root user, allowing
an attacker to overwrite/create files leading to a system compromise, so far bootstrap methods `library`,
`shub` and `localimage` are triggering the squashfs extraction. This issue is addressed in Singularity
3.6.4. All users are advised to upgrade to 3.6.4 especially if they use Singularity mainly for building
image as root user. There is no solid workaround except to temporary avoid to use unprivileged mode with
single file images in favor of sandbox images instead. Regarding image build, temporary avoid to build
from `library` and `shub` sources and as much as possible use `--fakeroot` or a VM for that.
(CVE-2020-15229)

Plugin Details

Severity: Critical

ID: 400318

Version: Revision 1.24

Type: Local

Family: Alpine Linux Local Security Checks

Published: 8/16/2023

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 56.9

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-15229

CVSS v3

Risk Factor: Critical

Base Score: 9.3

Temporal Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/2/2020

Vulnerability Publication Date: 10/13/2020

Reference Information

CVE: CVE-2020-15229

Detections

Analytics