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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:165126
[Eng]
Version
1
Class
patch
ALTXid
374006
Language
Russian
Severity
Medium
Title
ALAS-2021-1550 -- обновление безопасности для docker
Description
A flaw was found in the `userns-remap` feature of Docker. The root user in the remapped namespace can modify files under /var/lib/docker/remapping leading to possible privilege escalation to the root user in the host. The highest threat from this vulnerability is to data integrity. (CVE-2021-21284)
A flaw was found in Docker. Pulling an intentionally malformed Docker image manifest could lead to a crash of the `dockerd` daemon, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-21285)
Family
unix
Platform
Amazon Linux AMI
Product
docker
Reference
VENDOR: ALAS-2021-1550
VENDOR: ALAS-2021-1550
Id:
ALAS-2021-1550
Reference:
https://alas.aws.amazon.com/ALAS-2021-1550.html
CVE: CVE-2021-21284
CVE: CVE-2021-21284
Id:
CVE-2021-21284
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21284
Comment
: 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.
CVSSv2 Score:
2.7
Access vector:
ADJACENT_NETWORK
Access complexity:
LOW
Authentication:
SINGLE
Confidentiality impact:
NONE
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:A/AC:L/Au:S/C:N/I:P/A:N
CVSSv3 Score:
6.8
Attack vector:
ADJACENT_NETWORK
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
NONE
Integrity impact:
HIGH
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
CWE:
22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))
References:
https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c (MISC)
https://docs.docker.com/engine/release-notes/#20103 (MISC)
https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc (CONFIRM)
https://github.com/moby/moby/releases/tag/v19.03.15 (MISC)
https://github.com/moby/moby/releases/tag/v20.10.3 (MISC)
https://security.netapp.com/advisory/ntap-20210226-0005/ (CONFIRM)
DSA-4865 (DEBIAN)
GLSA-202107-23 (GENTOO)
CVE: CVE-2021-21285
CVE: CVE-2021-21285
Id:
CVE-2021-21285
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21285
Comment
: 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.
CVSSv2 Score:
4.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSSv3 Score:
6.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE:
754 (Improper Check for Unusual or Exceptional Conditions)
References:
https://docs.docker.com/engine/release-notes/#20103 (MISC)
https://github.com/moby/moby/security/advisories/GHSA-6fj5-m822-rqx8 (CONFIRM)
https://github.com/moby/moby/commit/8d3179546e79065adefa67cc697c09d0ab137d30 (MISC)
https://github.com/moby/moby/releases/tag/v19.03.15 (MISC)
https://github.com/moby/moby/releases/tag/v20.10.3 (MISC)
https://security.netapp.com/advisory/ntap-20210226-0005/ (CONFIRM)
DSA-4865 (DEBIAN)
GLSA-202107-23 (GENTOO)
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