Vulnerability Name:

CVE-2017-18270 (CCN-143608)

Assigned:2017-09-18
Published:2017-09-18
Updated:2020-08-14
Summary:In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.
CVSS v3 Severity:7.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H)
6.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C)
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): High
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
4.4 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
3.9 Low (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C)
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): Low
Availibility (A): Low
CVSS v2 Severity:3.6 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): Partial
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
Vulnerability Type:CWE-noinfo
CWE-287
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-18270

Source: CONFIRM
Type: Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3

Source: BID
Type: Third Party Advisory, VDB Entry
104254

Source: CCN
Type: BID-104254
Linux Kernel CVE-2017-18270 Local Denial of Service Vulnerability

Source: MISC
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1580979

Source: MISC
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11

Source: MISC
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9

Source: XF
Type: UNKNOWN
linux-kernel-cve201718270-dos(143608)

Source: CCN
Type: Linux Kernel GIT Repository
KEYS: prevent creating a different user's keyrings

Source: CONFIRM
Type: Patch
https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3

Source: CONFIRM
Type: UNKNOWN
https://support.f5.com/csp/article/K37301725

Source: UBUNTU
Type: UNKNOWN
USN-3754-1

Source: CONFIRM
Type: Release Notes
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 4.13.5)

    • Configuration RedHat 1:
  • cpe:/a:redhat:rhel_extras_rt:7:*:*:*:*:*:*:*

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

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

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

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

    • Configuration RedHat 6:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.13.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.cosmic:def:2017182700000000
    V
    		CVE-2017-18270 on Ubuntu 18.10 (cosmic) - medium.
    2018-05-18
    oval:com.ubuntu.cosmic:def:201718270000
    V
    		CVE-2017-18270 on Ubuntu 18.10 (cosmic) - medium.
    2018-05-18
    oval:com.ubuntu.bionic:def:2017182700000000
    V
    		CVE-2017-18270 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-05-18
    oval:com.ubuntu.trusty:def:201718270000
    V
    		CVE-2017-18270 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-05-18
    oval:com.ubuntu.xenial:def:2017182700000000
    V
    		CVE-2017-18270 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-05-18
    oval:com.ubuntu.artful:def:201718270000
    V
    		CVE-2017-18270 on Ubuntu 17.10 (artful) - medium.
    2018-05-18
    oval:com.ubuntu.xenial:def:201718270000
    V
    		CVE-2017-18270 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-05-18
    oval:com.ubuntu.bionic:def:201718270000
    V
    		CVE-2017-18270 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-05-18
    oval:com.redhat.rhsa:def:20181062
    P
    		RHSA-2018:1062: kernel security, bug fix, and enhancement update (Important)
    2018-04-10
    oval:com.redhat.rhsa:def:20180412
    P
    		RHSA-2018:0412: kernel-rt security and bug fix update (Important)
    2018-03-06
    BACK
    linux linux kernel *
    linux linux kernel 4.13.4