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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2014-10-13T10:00:00

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

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

Link: CVE-2014-7975

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

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

Modified: 2020-08-14T18:15:24.977

Link: CVE-2014-7975

cve-icon Redhat

Severity : Low

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

Links: CVE-2014-7975 - Bugzilla