CVE-2014-8989

kernel: Linux user namespaces can bypass group-based restrictions

Published Nov 30, 2014 CVSS 2.0 · 4.6 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2014-8816 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.
Ubuntu USN Ubuntu USN USN-2515-1 Linux kernel (Trusty HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-2516-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-2517-1 Linux kernel (Utopic HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-2518-1 Linux kernel vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 6, 2024, 1:33 PM
Reserved
Nov 19, 2014, 12:00 AM
Status
Modified
Published
Nov 30, 2014, 1:59 AM
Modified
Jun 17, 2026, 12:17 AM
Severity
Moderate
Public date
Nov 15, 2014, 12:00 AM