#VU41049 Permissions, Privileges, and Access Controls in Linux kernel - CVE-2014-8989

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Main Vulnerability Database Vulnerabilities #VU41049

#VU41049 Permissions, Privileges, and Access Controls in Linux kernel - CVE-2014-8989

Published: November 30, 2014 / Updated: August 9, 2020


Vulnerability identifier: #VU41049
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2014-8989
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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

Install update from vendor's website.

External links