Permissions, Privileges, and Access Controls in Linux kernel - CVE-2014-7975

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Main Vulnerability Database Vulnerabilities #VU41222

Permissions, Privileges, and Access Controls in Linux kernel - CVE-2014-7975

Published: October 13, 2014 / Updated: August 10, 2020


Vulnerability identifier: #VU41222
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2014-7975
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.


How to mitigate CVE-2014-7975

Install update from vendor's website.

Sources