Vulnerability CVE-2018-6553

Vulnerability Name:

CVE-2018-6553 (CCN-148250)

Assigned:

2018-07-11

Published:

2018-07-11

Updated:

2019-10-03

Summary:

The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.

CVSS v3 Severity:

8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/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): Changed
Impact Metrics:	Confidentiality (C): High 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:L/A:N)
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:L/A:N/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): Low Availibility (A): None

CVSS v2 Severity:

4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-noinfo

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2018-6553

Source: XF
Type: UNKNOWN
cups-cve20186553-sec-bypass(148250)

Source: MLIST
Type: Issue Tracking, Mailing List, Third Party Advisory
[debian-lts-announce] 20180714 [SECURITY] [DLA 1426-1] cups security update

Source: GENTOO
Type: UNKNOWN
GLSA-201908-08

Source: UBUNTU
Type: Third Party Advisory
USN-3713-1

Source: CCN
Type: Debian Security Advisory: DSA-4243-1
cups -- security update

Source: DEBIAN
Type: Third Party Advisory
DSA-4243

Vulnerable Configuration:

Configuration 1:

cpe:/a:cups:cups:-:*:*:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

OR cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

OR cpe:/o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

OR cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:ubuntu:ubuntu:14.04::~~lts~~~:*:*:*:*:*

OR cpe:/o:ubuntu:ubuntu:16.04::~~lts~~~:*:*:*:*:*

OR cpe:/o:ubuntu:ubuntu:17.10:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.bionic:def:201865530000000	V	CVE-2018-6553 on Ubuntu 18.04 LTS (bionic) - medium.	2018-08-10
oval:com.ubuntu.bionic:def:20186553000	V	CVE-2018-6553 on Ubuntu 18.04 LTS (bionic) - medium.	2018-08-10
oval:com.ubuntu.xenial:def:201865530000000	V	CVE-2018-6553 on Ubuntu 16.04 LTS (xenial) - medium.	2018-08-10
oval:com.ubuntu.trusty:def:20186553000	V	CVE-2018-6553 on Ubuntu 14.04 LTS (trusty) - medium.	2018-08-10
oval:com.ubuntu.xenial:def:20186553000	V	CVE-2018-6553 on Ubuntu 16.04 LTS (xenial) - medium.	2018-08-10
oval:com.ubuntu.artful:def:20186553000	V	CVE-2018-6553 on Ubuntu 17.10 (artful) - medium.	2018-07-11

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