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Vulnerability from cleanstart
Published
2026-07-30 07:10
Modified
2026-07-30 09:38
Summary
Security fixes in docker 20.10.3-r0
Details
Package docker version 20.10.3-r0 fixes 2 vulnerabilities: CVE-2021-21285, CVE-2021-21284
References
| URL | Type | |
|---|---|---|
{
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},
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"id": "CLEANSTART-2026-RZ50017",
"modified": "2026-07-30T09:38:57Z",
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}
CVE-2021-21284 (GCVE-0-2021-21284)
Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
privilege escalation in Moby
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.
Severity
6.8 (Medium)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://docs.docker.com/engine/release-notes/#20103 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v20.10.3 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v19.03.15 | x_refsource_MISC |
| https://github.com/moby/moby/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/moby/moby/commit/64bd4485b3a66… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021022… | x_refsource_CONFIRM |
| https://www.debian.org/security/2021/dsa-4865 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202107-23 | vendor-advisoryx_refsource_GENTOO |
Impacted products
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CVE-2021-21285 (GCVE-0-2021-21285)
Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Docker daemon crash during image pull of malicious image
Summary
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.
Severity
6.5 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/moby/moby/security/advisories/… | x_refsource_CONFIRM |
| https://docs.docker.com/engine/release-notes/#20103 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v20.10.3 | x_refsource_MISC |
| https://github.com/moby/moby/releases/tag/v19.03.15 | x_refsource_MISC |
| https://github.com/moby/moby/commit/8d3179546e790… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021022… | x_refsource_CONFIRM |
| https://www.debian.org/security/2021/dsa-4865 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202107-23 | vendor-advisoryx_refsource_GENTOO |
Impacted products
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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