CVE-2018-7311

** DISPUTED ** PrivateVPN 2.0.31 for macOS suffers from a root privilege escalation vulnerability. The software installs a privileged helper tool that runs as the root user. This privileged helper tool is installed as a LaunchDaemon and implements an XPC service. The XPC service is responsible for handling new VPN connection operations via the main PrivateVPN application. The privileged helper tool creates new VPN connections by executing the openvpn binary located in the /Applications/PrivateVPN.app/Contents/Resources directory. The openvpn binary can be overwritten by the default user, which allows an attacker that has already installed malicious software as the default user to replace the binary. When a new VPN connection is established, the privileged helper tool will launch this malicious binary, thus allowing an attacker to execute code as the root user. NOTE: the vendor has reportedly indicated that this behavior is "an acceptable part of their software."

CVSS v3.0 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/VerSprite/research/blob/eba22c8b506be6f7128ef5356281915d5667bfff/advisories/VS-2018-004.md	Third Party Advisory
https://gist.github.com/anonymous/cfc3f3419804b22ee9e82ee8d16a661d	Third Party Advisory
https://github.com/VerSprite/research/blob/master/advisories/VS-2018-004.md	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:privatevpn:privatevpn:2.0.31:*:*:*:*:macos:*:*

Information

Published : 2018-02-21 14:29

Updated : 2020-05-04 07:14

NVD link : CVE-2018-7311

Mitre link : CVE-2018-7311

JSON object : View

CWE

CWE-732

Incorrect Permission Assignment for Critical Resource

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Products Affected

privatevpn

privatevpn

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