Vulnerability Name:

CVE-2021-21284 (CCN-196047)

Assigned:2020-12-22
Published:2021-02-01
Updated:2022-04-29
Summary: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.
CVSS v3 Severity:6.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
8.0 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.0 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:2.7 Low (CVSS v2 Vector: AV:A/AC:L/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
7.7 High (CCN CVSS v2 Vector: AV:A/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-22
CWE-22
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2021-21284

Source: MISC
Type: Release Notes, Vendor Advisory
https://docs.docker.com/engine/release-notes/#20103

Source: XF
Type: UNKNOWN
docker-cve202121284-priv-esc(196047)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/moby/moby/releases/tag/v19.03.15

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/moby/moby/releases/tag/v20.10.3

Source: CCN
Type: moby GIT Repository
Access to remapped root allows privilege escalation to real root

Source: CONFIRM
Type: Third Party Advisory
https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc

Source: GENTOO
Type: Patch, Third Party Advisory
GLSA-202107-23

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210226-0005/

Source: DEBIAN
Type: Third Party Advisory
DSA-4865

Source: CCN
Type: IBM Security Bulletin 6427671 (API Connect)
IBM API Connect is impacted by vulnerabilities in Docker (CVE-2021-21285, CVE-2021-21284)

Source: CCN
Type: IBM Security Bulletin 6437021 (InfoSphere Information Server)
Vulnerabilities in Docker affects IBM InfoSphere Information Server

Source: CCN
Type: IBM Security Bulletin 6439521 (Cloud Pak System Software)
Vulnerabilities in Docker affect IBM Cloud Pak System

Source: CCN
Type: IBM Security Bulletin 6452959 (Spectrum Discover)
Vulnerabilities in the Python, Docker, and ICP affect IBM Spectrum Discover

Source: CCN
Type: IBM Security Bulletin 6455281 (Security Guardium)
IBM Security Guardium is affected by multiple vulnerabilities

Source: CCN
Type: IBM Security Bulletin 6466599 (Spectrum Protect Plus)
Vulnerabilities in MongoDB, Node.js, Docker, and XStream affect IBM Spectrum Protect Plus

Source: CCN
Type: IBM Security Bulletin 6486327 (Cloud Private)
IBM Cloud Private is vulnerable to Docker vulnerabilities (CVE-2021-21285, CVE-2021-21284)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:docker:docker:*:*:*:*:*:*:*:* (Version >= 20.0.0 and < 20.10.3)
  • OR cpe:/a:docker:docker:*:*:*:*:*:*:*:* (Version < 19.03.15)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* (Version >= 11.0.0 and <= 11.60.3)

    • Configuration CCN 1:
  • cpe:/a:docker:docker:19.03:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:infosphere_information_server:11.7:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:spectrum_protect_plus:10.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:10.5:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:10.6:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:2018.4.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:11.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:11.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:3.2.1:cd:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:3.2.2:cd:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:2018.4.1.13:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:10.0.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:11.2:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:10.0.1.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:security_guardium:11.3:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:spectrum_protect_plus:10.1.8:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7853
    P
    		docker-20.10.23_ce-150000.175.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:95287
    P
    		Security update for permissions (Important)
    2022-08-03
    oval:org.opensuse.security:def:3794
    P
    		Security update for the Linux Kernel (Important)
    2022-07-21
    oval:org.opensuse.security:def:93148
    P
    		 (Important)
    2022-07-06
    oval:org.opensuse.security:def:3799
    P
    		sysstat-12.0.2-10.24.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3801
    P
    		sysvinit-tools-2.88+-101.3.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3243
    P
    		libpython3_6m1_0-3.6.8-2.13 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:94710
    P
    		libsoup-2_4-1-2.74.2-150400.1.6 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94873
    P
    		docker-20.10.12_ce-159.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94715
    P
    		libssh2-1-1.9.0-4.13.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:93301
    P
    		 (Moderate)
    2022-06-02
    oval:org.opensuse.security:def:6056
    P
    		Security update for kernel-firmware (Moderate)
    2022-05-25
    oval:org.opensuse.security:def:99193
    P
    		 (Important)
    2022-03-30
    oval:org.opensuse.security:def:100097
    P
    		 (Important)
    2022-03-14
    oval:org.opensuse.security:def:102000
    P
    		Security update for the Linux Kernel (Live Patch 3 for SLE 15 SP3) (Critical)
    2022-02-16
    oval:org.opensuse.security:def:99478
    P
    		 (Important)
    2022-01-25
    oval:org.opensuse.security:def:112164
    P
    		docker-20.10.6_ce-2.1 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:1295
    P
    		Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) (Important)
    2021-12-15
    oval:org.opensuse.security:def:5935
    P
    		Security update for gettext-runtime (Moderate)
    2021-12-14
    oval:org.opensuse.security:def:105698
    P
    		docker-20.10.6_ce-2.1 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:99677
    P
    		 (Low)
    2021-09-07
    oval:org.opensuse.security:def:99985
    P
    		 (Moderate)
    2021-08-23
    oval:org.opensuse.security:def:101128
    P
    		docker-19.03.15_ce-6.46.1 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:62384
    P
    		docker-19.03.15_ce-6.46.1 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:102196
    P
    		Security update for qemu (Important)
    2021-07-21
    oval:org.opensuse.security:def:111579
    P
    		Security update for containerd, docker, runc (Important)
    2021-07-10
    oval:org.opensuse.security:def:99388
    P
    		 (Critical)
    2021-06-21
    oval:org.opensuse.security:def:111437
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-16
    oval:org.opensuse.security:def:8782
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:91943
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:101423
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:69669
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:94384
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:108089
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:64883
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:97064
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:9346
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:92329
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:103019
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:70240
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:99088
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93411
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:92727
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93746
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:75896
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93079
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:101678
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:9529
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:99646
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:70419
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:67145
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:94172
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:10100
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:100623
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:8977
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:92138
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:69868
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:108666
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:64890
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:98893
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:92528
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:99959
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:8603
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:69486
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:99279
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93568
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:10279
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:92926
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:5739
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:117603
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:66828
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93961
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:76213
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:93232
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:42090
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:9728
    P
    		Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:100294
    P
    		 (Important)
    2021-06-11
    oval:org.opensuse.security:def:101428
    P
    		Security update for dtc (Low)
    2021-05-13
    oval:org.opensuse.security:def:20650
    P
    		Security update for containerd, docker, runc (Important)
    2021-04-30
    oval:org.opensuse.security:def:49121
    P
    		Security update for containerd, docker, runc (Important)
    2021-04-30
    oval:org.opensuse.security:def:20656
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-12
    oval:org.opensuse.security:def:49127
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-12
    oval:org.opensuse.security:def:111218
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-12
    oval:org.opensuse.security:def:93595
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:10388
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:92995
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:99786
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:117608
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:67024
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:94005
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:9837
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:100372
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:8887
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:92048
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:69778
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:94427
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:108094
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:64888
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:95483
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:97212
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:92438
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:93439
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:92836
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:99587
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:93790
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:76092
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:9638
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:70528
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:94216
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:100706
    P
    		 (Important)
    2021-02-11
    oval:org.opensuse.security:def:9082
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:92243
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:69977
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:108862
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:98998
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    oval:org.opensuse.security:def:92637
    P
    		Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork (Important)
    2021-02-11
    BACK
    docker docker *
    docker docker *
    debian debian linux 10.0
    netapp e-series santricity os controller *
    docker docker 19.03
    ibm infosphere information server 11.7
    ibm spectrum protect plus 10.1.0
    ibm security guardium 10.5
    ibm security guardium 10.6
    ibm api connect 2018.4.1.0
    ibm security guardium 11.0
    ibm security guardium 11.1
    ibm cloud private 3.2.1 cd
    ibm cloud private 3.2.2 cd
    ibm api connect 2018.4.1.13
    ibm api connect 10.0.0.0
    ibm security guardium 11.2
    ibm api connect 10.0.1.1
    ibm security guardium 11.3
    ibm spectrum protect plus 10.1.8