Vulnerability Name:

CVE-2014-7975 (CCN-96994)

Assigned:2014-10-08
Published:2014-10-08
Updated:2020-08-14
Summary: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 v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
3.7 Low (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
2.9 Low (REDHAT CVSS v2 Vector: AV:A/AC:M/Au:N/C:N/I:N/A:P)
2.1 Low (REDHAT Temporal CVSS v2 Vector: AV:A/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2014-7975

Source: CONFIRM
Type: Mailing List, Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5

Source: CCN
Type: oss-security Mailing List, Wed, 8 Oct 2014 12:54:15 -0700
CVE-2014-7975: 0-day umount denial of service

Source: SECUNIA
Type: Broken Link
60174

Source: SECUNIA
Type: Broken Link
61145

Source: SECUNIA
Type: Broken Link
62633

Source: SECUNIA
Type: Broken Link
62634

Source: MLIST
Type: Broken Link
[stable] 20141008 [PATCH] fs: Add a missing permission check to do_umount

Source: CCN
Type: IBM Security Bulletin 1021943
PowerKVM Kernel Vulnerabilities - Multiple CVEs

Source: CCN
Type: IBM Security Bulletin T1026731 (PowerKVM)
Vulnerabilities in the Linux kernel affect PowerKVM

Source: CCN
Type: IBM Security Bulletin 2011746 (QRadar Network Security)
IBM QRadar Network Security is affected by vulnerabilities in Linux kernel

Source: CCN
Type: The Linux Kernel Archives Web site
Linux Kernel

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20141008 CVE-2014-7975: 0-day umount denial of service

Source: BID
Type: Third Party Advisory, VDB Entry
70314

Source: CCN
Type: BID-70314
Linux Kernel CVE-2014-7975 Local Denial of Service Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1031180

Source: UBUNTU
Type: Third Party Advisory
USN-2415-1

Source: UBUNTU
Type: Third Party Advisory
USN-2416-1

Source: UBUNTU
Type: Third Party Advisory
USN-2417-1

Source: UBUNTU
Type: Third Party Advisory
USN-2418-1

Source: UBUNTU
Type: Third Party Advisory
USN-2419-1

Source: UBUNTU
Type: Third Party Advisory
USN-2420-1

Source: UBUNTU
Type: Third Party Advisory
USN-2421-1

Source: REDHAT
Type: Third Party Advisory
RHSA-2017:1842

Source: REDHAT
Type: Third Party Advisory
RHSA-2017:2077

Source: CCN
Type: Red Hat Bugzilla Bug 1151108
(CVE-2014-7975) CVE-2014-7975 Kernel: fs: umount denial of service

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1151108

Source: XF
Type: Third Party Advisory, VDB Entry
linux-kernel-cve20147975-dos(96994)

Source: XF
Type: UNKNOWN
linux-kernel-cve20147975-dos(96994)

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2014-7975

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 3.17)

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::computenode:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/a:redhat:rhel_extras_rt:7:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:-:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:powerkvm:2.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:powerkvm:3.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:qradar_network_security:5.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20147975
    V
    		CVE-2014-7975
    2022-05-22
    oval:com.redhat.rhsa:def:20171842
    P
    		RHSA-2017:1842: kernel security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:com.redhat.rhsa:def:20172077
    P
    		RHSA-2017:2077: kernel-rt security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:org.mitre.oval:def:28298
    P
    		USN-2421-1 -- Linux kernel vulnerabilities
    2015-03-09
    oval:org.mitre.oval:def:28026
    P
    		USN-2419-1 -- Linux kernel (Trusty HWE) vulnerabilities
    2015-01-26
    oval:org.mitre.oval:def:28454
    P
    		USN-2420-1 -- Linux kernel vulnerabilities
    2015-01-26
    oval:org.mitre.oval:def:27543
    P
    		USN-2415-1 -- Linux kernel vulnerability
    2015-01-26
    oval:org.mitre.oval:def:28348
    P
    		USN-2416-1 -- Linux kernel (EC2) vulnerabilities
    2015-01-26
    oval:org.mitre.oval:def:27756
    P
    		USN-2418-1 -- Linux kernel (OMAP4) vulnerabilities
    2015-01-26
    oval:org.mitre.oval:def:28423
    P
    		USN-2417-1 -- Linux kernel vulnerabilities
    2015-01-26
    oval:com.ubuntu.xenial:def:20147975000
    V
    		CVE-2014-7975 on Ubuntu 16.04 LTS (xenial) - medium.
    2014-10-13
    oval:com.ubuntu.precise:def:20147975000
    V
    		CVE-2014-7975 on Ubuntu 12.04 LTS (precise) - medium.
    2014-10-13
    oval:com.ubuntu.xenial:def:201479750000000
    V
    		CVE-2014-7975 on Ubuntu 16.04 LTS (xenial) - medium.
    2014-10-13
    oval:com.ubuntu.trusty:def:20147975000
    V
    		CVE-2014-7975 on Ubuntu 14.04 LTS (trusty) - medium.
    2014-10-13
    BACK
    linux linux kernel *
    canonical ubuntu linux 10.04
    canonical ubuntu linux 12.04
    canonical ubuntu linux 14.04
    canonical ubuntu linux 14.10
    linux linux kernel -
    ibm powerkvm 2.1
    ibm powerkvm 3.1
    ibm qradar network security 5.4