The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2014-11-30T01:00:00

Updated: 2024-08-06T13:33:12.646Z

Reserved: 2014-11-19T00:00:00

Link: CVE-2014-8989

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2014-11-30T01:59:07.570

Modified: 2017-01-03T02:59:22.313

Link: CVE-2014-8989

cve-icon Redhat

Severity : Moderate

Publid Date: 2014-11-15T00:00:00Z

Links: CVE-2014-8989 - Bugzilla