CVE-2021-41091

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Summary

CVECVE-2021-41091
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-10-04 21:15:00 UTC
Updated2023-11-07 03:38:00 UTC
DescriptionMoby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade limit access to the host to trusted users. Limit access to host volumes to trusted containers.

Risk And Classification

Problem Types: CWE-281

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 34 All All All
Operating System Fedoraproject Fedora 35 All All All
Application Mobyproject Moby All All All All

References

ReferenceSourceLinkTags
Merge pull request #2 from moby/20.10-GHSA-3fwx-pjgw-3558_0701-perms · moby/moby@f0ab919 · GitHub MISC github.com
Insufficiently restricted permissions on data directory · Advisory · moby/moby · GitHub CONFIRM github.com
[SECURITY] Fedora 34 Update: moby-engine-20.10.9-1.fc34 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[SECURITY] Fedora 34 Update: moby-engine-20.10.9-1.fc34 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf CONFIRM cert-portal.siemens.com
[SECURITY] Fedora 35 Update: moby-engine-20.10.9-1.fc35 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[SECURITY] Fedora 35 Update: moby-engine-20.10.9-1.fc35 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 179504 Debian Security Update for docker.io (CVE-2021-41091)
  • 281996 Fedora Security Update for containerd (FEDORA-2021-df975338d4)
  • 352849 Amazon Linux Security Advisory for docker: ALAS-2021-1537
  • 353186 Amazon Linux Security Advisory for docker : ALAS2NITRO-ENCLAVES-2022-017
  • 353191 Amazon Linux Security Advisory for docker : ALAS2DOCKER-2022-017
  • 356876 Amazon Linux Security Advisory for docker : ALAS2ECS-2023-028
  • 501837 Alpine Linux Security Update for docker
  • 504679 Alpine Linux Security Update for docker
  • 590976 Siemens SCALANCE LPE9403 Third-Party Multiple Vulnerabilities (ICSA-22-167-09) (SSA-222547)
  • 6140147 AWS Bottlerocket Security Update for docker-engine (GHSA-qw38-5p6x-cgx3)
  • 672019 EulerOS Security Update for docker-engine (EulerOS-SA-2022-2253)
  • 672023 EulerOS Security Update for docker (EulerOS-SA-2022-2265)
  • 672049 EulerOS Security Update for docker-engine (EulerOS-SA-2022-2240)
  • 672074 EulerOS Security Update for docker-engine (EulerOS-SA-2022-2218)
  • 672110 EulerOS Security Update for docker-engine (EulerOS-SA-2022-2311)
  • 751272 SUSE Enterprise Linux Security Update for containerd, docker, runc (SUSE-SU-2021:3506-1)
  • 751273 OpenSUSE Security Update for containerd, docker, runc (openSUSE-SU-2021:3506-1)
  • 751303 OpenSUSE Security Update for containerd, docker, runc (openSUSE-SU-2021:1404-1)
  • 751692 OpenSUSE Security Update for containerd, docker (openSUSE-SU-2022:0334-1)
  • 753284 SUSE Enterprise Linux Security Update for containerd, docker (SUSE-SU-2022:0334-1)
  • 997032 GO (Go) Security Update for github.com/moby/moby (GHSA-3fwx-pjgw-3558)
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