Vulnerability CVE-2018-12027

Vulnerability Name:

CVE-2018-12027 (CCN-144987)

Assigned:

2018-06-13

Published:

2018-06-13

Updated:

2019-10-03

Summary:

An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the application's user, then that non-application user can swap that directory with something else, resulting in traffic being redirected to a non-application user's process through an alternative Unix domain socket.

CVSS v3 Severity:

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

CVSS v2 Severity:

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

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
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:P/I:N/A:N)

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

Vulnerability Type:

CWE-732
CWE-200

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2018-12027

Source: CCN
Type: Phusion Blog, June 12th, 2018
Passenger 5.3.2: various security fixes

Source: MISC
Type: Mitigation, Vendor Advisory
https://blog.phusion.nl/passenger-5-3-2

Source: XF
Type: UNKNOWN
phusion-cve201812027-info-disc(144987)

Source: GENTOO
Type: Third Party Advisory
GLSA-201807-02

Source: CCN
Type: Phusion Web site
Passenger - Enterprise grade web app server for Ruby, Node.js, Python

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-12027

Vulnerable Configuration:

Configuration 1:

cpe:/a:phusion:passenger:*:*:*:*:*:*:*:* (Version >= 5.3.0 and < 5.3.2)

Configuration CCN 1:

cpe:/a:phusion:passenger:5.3.1:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:2018120270000000	V	CVE-2018-12027 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-17
oval:com.ubuntu.artful:def:201812027000	V	CVE-2018-12027 on Ubuntu 17.10 (artful) - medium.	2018-06-17
oval:com.ubuntu.xenial:def:201812027000	V	CVE-2018-12027 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-17
oval:com.ubuntu.disco:def:2018120270000000	V	CVE-2018-12027 on Ubuntu 19.04 (disco) - medium.	2018-06-17
oval:com.ubuntu.bionic:def:201812027000	V	CVE-2018-12027 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-17
oval:com.ubuntu.cosmic:def:2018120270000000	V	CVE-2018-12027 on Ubuntu 18.10 (cosmic) - medium.	2018-06-17
oval:com.ubuntu.cosmic:def:201812027000	V	CVE-2018-12027 on Ubuntu 18.10 (cosmic) - medium.	2018-06-17
oval:com.ubuntu.bionic:def:2018120270000000	V	CVE-2018-12027 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-17
oval:com.ubuntu.trusty:def:201812027000	V	CVE-2018-12027 on Ubuntu 14.04 LTS (trusty) - medium.	2018-06-17

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