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Vulnerability Details : 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 writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.
Publish Date : 2014-10-13 Last Update Date : 2020-08-14
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- CVSS Scores & Vulnerability Types

CVSS Score
4.9
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID CWE id is not defined for this vulnerability

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:1842: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20171842 unix
RHSA-2017:2077: kernel-rt security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20172077 unix
USN-2415-1 -- Linux kernel vulnerability oval:org.mitre.oval:def:27543 unix
USN-2416-1 -- Linux kernel (EC2) vulnerabilities oval:org.mitre.oval:def:28348 unix
USN-2417-1 -- Linux kernel vulnerabilities oval:org.mitre.oval:def:28423 unix
USN-2418-1 -- Linux kernel (OMAP4) vulnerabilities oval:org.mitre.oval:def:27756 unix
USN-2419-1 -- Linux kernel (Trusty HWE) vulnerabilities oval:org.mitre.oval:def:28026 unix
USN-2420-1 -- Linux kernel vulnerabilities oval:org.mitre.oval:def:28454 unix
USN-2421-1 -- Linux kernel vulnerabilities oval:org.mitre.oval:def:28298 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2014-7975

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 10.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 12.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 14.10 * * * Version Details Vulnerabilities
5 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4
Linux Linux Kernel 1

- References For CVE-2014-7975

http://www.ubuntu.com/usn/USN-2417-1
UBUNTU USN-2417-1
http://secunia.com/advisories/62634
SECUNIA 62634
http://secunia.com/advisories/62633
SECUNIA 62633
http://secunia.com/advisories/60174
SECUNIA 60174
http://www.securitytracker.com/id/1031180
SECTRACK 1031180
http://www.ubuntu.com/usn/USN-2419-1
UBUNTU USN-2419-1
http://www.ubuntu.com/usn/USN-2420-1
UBUNTU USN-2420-1
http://www.ubuntu.com/usn/USN-2416-1
UBUNTU USN-2416-1
http://www.ubuntu.com/usn/USN-2418-1
UBUNTU USN-2418-1
http://www.ubuntu.com/usn/USN-2421-1
UBUNTU USN-2421-1
http://www.ubuntu.com/usn/USN-2415-1
UBUNTU USN-2415-1
http://secunia.com/advisories/61145
SECUNIA 61145
http://www.openwall.com/lists/oss-security/2014/10/08/22
MLIST [oss-security] 20141008 CVE-2014-7975: 0-day umount denial of service
http://thread.gmane.org/gmane.linux.kernel.stable/109312
MLIST [stable] 20141008 [PATCH] fs: Add a missing permission check to do_umount
https://bugzilla.redhat.com/show_bug.cgi?id=1151108 CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilities/96994
XF linux-kernel-cve20147975-dos(96994)
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5 CONFIRM
http://www.securityfocus.com/bid/70314
BID 70314 Linux Kernel CVE-2014-7975 Local Denial of Service Vulnerability Release Date:2014-12-24
https://access.redhat.com/errata/RHSA-2017:2077
REDHAT RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:1842
REDHAT RHSA-2017:1842

- Metasploit Modules Related To CVE-2014-7975

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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