Detections
Analytics

Alpine: multiple docker packages: security update to 20.10.3-r0

medium Tenable Cloud Security Plugin ID 404109

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

 - In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in
 which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if
 the root user in the remapped namespace has access to the host filesystem they can modify files under
 "/var/lib/docker/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and
 19.03.15 contain patches that prevent privilege escalation from remapped user. (CVE-2021-21284)

 - In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally
 malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches
 that prevent the daemon from crashing. (CVE-2021-21285)

See Also

https://security.alpinelinux.org/vuln/CVE-2021-21284

https://security.alpinelinux.org/vuln/CVE-2021-21285

Plugin Details

Severity: Medium

ID: 404109

Version: Revision 1.28

Type: Local

Published: 10/31/2023

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.3

Percentile: 96.59

CVSS v2

Risk Factor: Low

Base Score: 2.7

Temporal Score: 2

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

CVSS Score Source: CVE-2021-21284

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/2/2021

Reference Information

CVE: CVE-2021-21284, CVE-2021-21285