Vulnerability Name:

CVE-2016-6213 (CCN-114989)

Assigned:2016-07-13
Published:2016-07-13
Updated:2018-01-05
Summary:fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.
CVSS v3 Severity:4.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
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): Low
4.7 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.1 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.7 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.0 Medium (REDHAT CVSS v2 Vector: AV:L/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-400
CWE-770
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2016-6213

Source: CONFIRM
Type: Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498

Source: CCN
Type: oss-sec Mailing List, Wed, 13 Jul 2016 12:59:40 -0400 (EDT)
Re: cve request: local DoS by overflowing kernel mount table using shared bind mount

Source: CCN
Type: oss-sec Mailing List, Wed, 13 Jul 2016 10:52:44 -0400 (EDT)
cve request: local DoS by overflowing kernel mount table using shared bind mount

Source: CCN
Type: IBM Security Bulletin T1025263 (PowerKVM)
Vulnerabilities in the Linux Kernel affect PowerKVM

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: MLIST
Type: Mailing List
[oss-security] 20160713 Re: cve request: local DoS by overflowing kernel mount table using shared bind mount

Source: BID
Type: UNKNOWN
91754

Source: CCN
Type: BID-91754
Linux Kernel CVE-2016-6213 Local Denial of Service Vulnerability

Source: REDHAT
Type: UNKNOWN
RHSA-2017:1842

Source: REDHAT
Type: UNKNOWN
RHSA-2017:2077

Source: CONFIRM
Type: Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1356471

Source: XF
Type: UNKNOWN
linux-kernel-cve20166213-dos(114989)

Source: CONFIRM
Type: Patch
https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2016-6213

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.8.15)

  • 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: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:com.ubuntu.xenial:def:20166213000
    V
    CVE-2016-6213 on Ubuntu 16.04 LTS (xenial) - medium.
    2016-12-28
    oval:com.ubuntu.xenial:def:201662130000000
    V
    CVE-2016-6213 on Ubuntu 16.04 LTS (xenial) - medium.
    2016-12-28
    oval:com.ubuntu.precise:def:20166213000
    V
    CVE-2016-6213 on Ubuntu 12.04 LTS (precise) - medium.
    2016-12-28
    oval:com.ubuntu.trusty:def:20166213000
    V
    CVE-2016-6213 on Ubuntu 14.04 LTS (trusty) - medium.
    2016-12-28
    BACK
    linux linux kernel *
    linux linux kernel -
    ibm powerkvm 2.1
    ibm powerkvm 3.1
    ibm qradar network security 5.4