CVE-2021-43816

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-43816
containerd is an open source container runtime. On installations using SELinux, such as EL8 (CentOS, RHEL), Fedora, or SUSE MicroOS, with containerd since v1.5.0-beta.0 as the backing container runtime interface (CRI), an unprivileged pod scheduled to the node may bind mount, via hostPath volume, any privileged, regular file on disk for complete read/write access (sans delete). Such is achieved by placing the in-container location of the hostPath volume mount at either `/etc/hosts`, `/etc/hostname`, or `/etc/resolv.conf`. These locations are being relabeled indiscriminately to match the container process-label which effectively elevates permissions for savvy containers that would not normally be able to access privileged host files. This issue has been resolved in version 1.5.9. Users are advised to upgrade as soon as possible.

9.1 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.0 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:S/C:P/I:P/A:P

Exploitability : 6.8 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References
Link Resource
https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea Patch Third Party Advisory
https://github.com/containerd/containerd/issues/6194 Exploit Issue Tracking Third Party Advisory
https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c Third Party Advisory
https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:-:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta0:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta2:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta4:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc0:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc3:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
History

07 Nov 2023, 03:39

Type Values Removed Values Added
References
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/', 'name': 'FEDORA-2022-a0b2a4d594', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/', 'name': 'FEDORA-2022-f668c3d70d', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/ -

01 Apr 2022, 14:50

Type Values Removed Values Added
CPE cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
First Time Fedoraproject fedora
Fedoraproject
References (CONFIRM) https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c - Vendor Advisory (CONFIRM) https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c - Third Party Advisory
References (MISC) https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 - Issue Tracking (MISC) https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 - Patch, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/ - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/ - Mailing List, Third Party Advisory
References (MISC) https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea - Issue Tracking, Patch (MISC) https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea - Patch, Third Party Advisory
References (MISC) https://github.com/containerd/containerd/issues/6194 - Issue Tracking, Technical Description (MISC) https://github.com/containerd/containerd/issues/6194 - Exploit, Issue Tracking, Third Party Advisory

15 Feb 2022, 03:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/ -
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/ -

18 Jan 2022, 18:22

Type Values Removed Values Added
CPE cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta2:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:-:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc0:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta4:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta0:*:*:*:*:*:*
CWE CWE-281
First Time Linuxfoundation containerd
Linuxfoundation
CVSS v2 : unknown
v3 : unknown 		v2 : 6.0
v3 : 9.1
References (CONFIRM) https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c - (CONFIRM) https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c - Vendor Advisory
References (MISC) https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea - (MISC) https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea - Issue Tracking, Patch
References (MISC) https://github.com/containerd/containerd/issues/6194 - (MISC) https://github.com/containerd/containerd/issues/6194 - Issue Tracking, Technical Description
References (MISC) https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 - (MISC) https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 - Issue Tracking

05 Jan 2022, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2022-01-05 19:15

Updated : 2023-12-10 14:09

NVD link : CVE-2021-43816

Mitre link : CVE-2021-43816

CVE.ORG link : CVE-2021-43816

JSON object : View

Products Affected

fedoraproject

  • fedora

linuxfoundation

  • containerd
CWE
CWE-281

Improper Preservation of Permissions