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Mageia 8: 2021-0500 Moderate: Docker Access Control Problems

mageia
Calendar Grey October 31, 2021
Dist Mageia Esm H88
Recent updates to Docker libraries rectify vulnerabilities concerning access rights and settings that affect Mageia operating systems.
Updated docker packages fix security vulnerabilities: A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container c...

Summary

Updated docker packages fix security vulnerabilities:
A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the hosts filesystem, widening access to others. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process (CVE-2021-41089).
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 ...

Read the Full Advisory

References

- https://bugs.mageia.org/show_bug.cgi?id=29527

- https://www.cve.org/CVERecord?id=CVE-2021-41089

- https://www.cve.org/CVERecord?id=CVE-2021-41091

- https://www.cve.org/CVERecord?id=CVE-2021-41092

Resolution

SRPMS

- 8/core/docker-20.10.9-3.mga8

Publication date: 31 Oct 2021
URL: https://advisories.mageia.org/MGASA-2021-0500.html
Type: security
CVE: CVE-2021-41089, CVE-2021-41091, CVE-2021-41092

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