Vulnerability Name:

CVE-2018-6559 (CCN-152030)

Assigned:2018-09-20
Published:2018-09-20
Updated:2019-10-09
Summary:The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.
CVSS v3 Severity:3.3 Low (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
2.9 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:U/RC:R)
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): Low
Integrity (I): None
Availibility (A): None
3.3 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
2.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:U/RC:R)
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): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2018-6559

Source: BID
Type: Third Party Advisory, VDB Entry
105752

Source: CCN
Type: BID-105752
Linux Kernel CVE-2018-6559 Local Information Disclosure Vulnerability

Source: CCN
Type: Launchpad Bug #1793458
Overlayfs in user namespace leaks directory content of inaccessible directories

Source: XF
Type: UNKNOWN
linux-kernel-cve20186559-info-disc(152030)

Source: CONFIRM
Type: Exploit, Issue Tracking, Third Party Advisory
https://launchpad.net/bugs/1793458

Source: CONFIRM
Type: Third Party Advisory
https://lists.ubuntu.com/archives/kernel-team/2018-October/096172.html

Source: CONFIRM
Type: Third Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-6559.html

Source: UBUNTU
Type: Third Party Advisory
USN-3832-1

Source: UBUNTU
Type: Third Party Advisory
USN-3833-1

Source: UBUNTU
Type: Third Party Advisory
USN-3835-1

Source: UBUNTU
Type: Third Party Advisory
USN-3836-1

Source: UBUNTU
Type: Third Party Advisory
USN-3836-2

Source: CCN
Type: Ubuntu Web site
Ubuntu

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-6559

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:-:*:*:*:*:*:*:*
  • AND
  • cpe:/o:canonical:ubuntu:18.10:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:20186559000
    V
    		CVE-2018-6559 on Ubuntu 18.04 LTS (bionic) - low.
    2018-10-26
    oval:com.ubuntu.cosmic:def:201865590000000
    V
    		CVE-2018-6559 on Ubuntu 18.10 (cosmic) - low.
    2018-10-26
    oval:com.ubuntu.cosmic:def:20186559000
    V
    		CVE-2018-6559 on Ubuntu 18.10 (cosmic) - low.
    2018-10-26
    oval:com.ubuntu.bionic:def:201865590000000
    V
    		CVE-2018-6559 on Ubuntu 18.04 LTS (bionic) - low.
    2018-10-26
    oval:com.ubuntu.trusty:def:20186559000
    V
    		CVE-2018-6559 on Ubuntu 14.04 LTS (trusty) - low.
    2018-10-26
    oval:com.ubuntu.xenial:def:201865590000000
    V
    		CVE-2018-6559 on Ubuntu 16.04 LTS (xenial) - low.
    2018-10-26
    oval:com.ubuntu.xenial:def:20186559000
    V
    		CVE-2018-6559 on Ubuntu 16.04 LTS (xenial) - low.
    2018-10-26
    BACK
    linux linux kernel -
    canonical ubuntu linux 16.04
    canonical ubuntu linux 18.04
    canonical ubuntu linux 18.10
    linux linux kernel -
    canonical ubuntu 18.10