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.
Vulnerability category: Denial of service
Products affected by CVE-2014-7975
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2014-7975
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2014-7975
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
References for CVE-2014-7975
-
http://www.ubuntu.com/usn/USN-2417-1
USN-2417-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://exchange.xforce.ibmcloud.com/vulnerabilities/96994
Linux Kernel umount denial of service CVE-2014-7975 Vulnerability ReportThird Party Advisory;VDB Entry
-
http://www.ubuntu.com/usn/USN-2420-1
USN-2420-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://www.securitytracker.com/id/1031180
Linux Kernel do_umount() Privilege Flaw Lets Local Users Deny Service - SecurityTrackerThird Party Advisory;VDB Entry
-
http://www.securityfocus.com/bid/70314
Linux Kernel CVE-2014-7975 Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
http://www.ubuntu.com/usn/USN-2415-1
USN-2415-1: Linux kernel vulnerability | Ubuntu security noticesThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2017:1842
RHSA-2017:1842 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2017:2077
RHSA-2017:2077 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5
kernel/git/torvalds/linux.git - Linux kernel source treeMailing List;Patch;Vendor Advisory
-
http://www.ubuntu.com/usn/USN-2418-1
USN-2418-1: Linux kernel (OMAP4) vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://www.ubuntu.com/usn/USN-2416-1
USN-2416-1: Linux kernel (EC2) vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1151108
1151108 – (CVE-2014-7975) CVE-2014-7975 Kernel: fs: umount denial of serviceIssue Tracking;Patch;Third Party Advisory
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http://www.ubuntu.com/usn/USN-2419-1
USN-2419-1: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://www.ubuntu.com/usn/USN-2421-1
USN-2421-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://www.openwall.com/lists/oss-security/2014/10/08/22
oss-security - CVE-2014-7975: 0-day umount denial of serviceMailing List;Third Party Advisory
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