CVE-2021-21284
CVSS V2 Low 2.7
CVSS V3 Medium 6.8
Description
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.
Overview
- CVE ID
- CVE-2021-21284
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-02T18:15:11
- Last Modified Date
- 2022-04-29T19:22:01
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:* | 1 | OR | 19.03.15 | |
| cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:* | 1 | OR | 20.0.0 | 20.10.3 |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* | 1 | OR | 11.0.0 | 11.60.3 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:A/AC:L/Au:S/C:N/I:P/A:N
- Access Vector
- ADJACENT_NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 2.7
- Severity
- LOW
- Exploitability Score
- 5.1
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
- Attack Vector
- ADJACENT_NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 6.8
- Base Severity
- MEDIUM
- Exploitability Score
- 2.3
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c | Patch Third Party Advisory |
| https://docs.docker.com/engine/release-notes/#20103 | Release Notes Vendor Advisory |
| https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc | Third Party Advisory |
| https://github.com/moby/moby/releases/tag/v19.03.15 | Release Notes Third Party Advisory |
| https://github.com/moby/moby/releases/tag/v20.10.3 | Release Notes Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210226-0005/ | Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4865 | Third Party Advisory |
| https://security.gentoo.org/glsa/202107-23 | Patch Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-21284 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21284 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-08 06:20:20 | Added to TrackCVE | |||
| 2022-12-05 21:12:57 | 2021-02-02T18:15Z | 2021-02-02T18:15:11 | CVE Published Date | updated |
| 2022-12-05 21:12:57 | 2022-04-29T19:22:01 | CVE Modified Date | updated | |
| 2022-12-05 21:12:57 | Analyzed | Vulnerability Status | updated |