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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2014-7824 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.
Ubuntu USN Ubuntu USN USN-2415-1 Linux kernel vulnerability
Ubuntu USN Ubuntu USN USN-2416-1 Linux kernel (EC2) vulnerabilities
Ubuntu USN Ubuntu USN USN-2417-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-2418-1 Linux kernel (OMAP4) vulnerabilities
Ubuntu USN Ubuntu USN USN-2419-1 Linux kernel (Trusty HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-2420-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-2421-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

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History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-06T13:03:27.690Z

Reserved: 2014-10-08T00:00:00.000Z

Link: CVE-2014-7975

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2014-10-13T10:55:09.263

Modified: 2025-04-12T10:46:40.837

Link: CVE-2014-7975

cve-icon Redhat

Severity : Low

Publid Date: 2014-10-08T00:00:00Z

Links: CVE-2014-7975 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses