CVE-2014-7975
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…
Does this matter?
Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5Mailing List, Patch, Vendor Advisory
- http://secunia.com/advisories/60174Broken Link
- http://secunia.com/advisories/61145Broken Link
- http://secunia.com/advisories/62633Broken Link
- http://secunia.com/advisories/62634Broken Link
- http://thread.gmane.org/gmane.linux.kernel.stable/109312Broken Link
- http://www.openwall.com/lists/oss-security/2014/10/08/22Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/70314Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1031180Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2415-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2416-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2417-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2418-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2419-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2420-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2421-1Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1151108Issue Tracking, Patch, Third Party Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/96994Third Party Advisory, VDB Entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5Mailing List, Patch, Vendor Advisory
- http://secunia.com/advisories/60174Broken Link
- http://secunia.com/advisories/61145Broken Link
- http://secunia.com/advisories/62633Broken Link
- http://secunia.com/advisories/62634Broken Link
- http://thread.gmane.org/gmane.linux.kernel.stable/109312Broken Link
- http://www.openwall.com/lists/oss-security/2014/10/08/22Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/70314Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1031180Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2415-1Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.