Vulnerability Name:

CVE-2018-6556

Assigned:2018-08-07
Published:2018-08-07
Updated:2018-08-10
Summary:lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.
CVSS v3 Severity:6.5 Medium (CCN CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
5.7 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
References:Source: CONFIRM
Type: UNKNOWN
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.suse.com/show_bug.cgi?id=988348

Source: XF
Type: UNKNOWN
lxc-cve20186556-info-disc(148027)

Source: UBUNTU
Type: UNKNOWN
USN-3730-1

Oval Definitions
Definition IDClassTitleLast Modified
oval:org.opensuse.security:def:20186556
V
CVE-2018-6556
2018-08-15
oval:com.ubuntu.xenial:def:20186556000
V
CVE-2018-6556 on Ubuntu 16.04 LTS (xenial) - medium.
2018-08-10
oval:com.ubuntu.trusty:def:20186556000
V
CVE-2018-6556 on Ubuntu 14.04 LTS (trusty) - medium.
2018-08-10
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