cve-2021-21284
Vulnerability from cvelistv5
Published
2021-02-02 17:55
Modified
2024-08-03 18:09
Severity ?
6.8 (Medium) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
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.
References
security-advisories@github.comhttps://docs.docker.com/engine/release-notes/#20103Release Notes, Vendor Advisory
security-advisories@github.comhttps://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7cPatch, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/releases/tag/v19.03.15Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/releases/tag/v20.10.3Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpcThird Party Advisory
security-advisories@github.comhttps://security.gentoo.org/glsa/202107-23Patch, Third Party Advisory
security-advisories@github.comhttps://security.netapp.com/advisory/ntap-20210226-0005/Third Party Advisory
security-advisories@github.comhttps://www.debian.org/security/2021/dsa-4865Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://docs.docker.com/engine/release-notes/#20103Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7cPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/releases/tag/v19.03.15Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/releases/tag/v20.10.3Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpcThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202107-23Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210226-0005/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4865Third Party Advisory
Impacted products
Vendor Product Version
moby moby Version: < 19.03.15
Version: >= 20.0.0, < 20.10.3
 Create a notification for this product.
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reasignado\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N\",\"baseScore\":6.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.3,\"impactScore\":4.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N\",\"baseScore\":6.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.3,\"impactScore\":4.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:L/Au:S/C:N/I:P/A:N\",\"baseScore\":2.7,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":5.1,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"19.03.15\",\"matchCriteriaId\":\"C6B22016-AB78-4E82-9F65-AEC2526F3EDF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"20.0.0\",\"versionEndExcluding\":\"20.10.3\",\"matchCriteriaId\":\"B4427D14-D219-490B-8467-40FE253775A1\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.0.0\",\"versionEndIncluding\":\"11.60.3\",\"matchCriteriaId\":\"BD1E9594-C46F-40D1-8BC2-6B16635B55C4\"}]}]}],\"references\":[{\"url\":\"https://docs.docker.com/engine/release-notes/#20103\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/moby/moby/releases/tag/v19.03.15\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/moby/moby/releases/tag/v20.10.3\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202107-23\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210226-0005/\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party 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Advisory\"]},{\"url\":\"https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202107-23\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210226-0005/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2021/dsa-4865\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
   },
}


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Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.