Vulnerability Report

CVE-2018-9336

Title: Openvpn Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2018-9336.

CWE Category CWE-415
Published Date May 01, 2018
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 7.8 CVSS v3.0
Exploit Probability (EPSS)
0.61%

Vulnerability Summary

CVE-2018-9336: openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have unspecified other impact including privilege escalation.

Impacted Vendors

A
aviatrix 1
O
openvpn 1

Reference Links

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 https://www.tenable.com/security/research/tra-2018-09 http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 https://www.tenable.com/security/research/tra-2018-09
CVSS v3.0
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
4.6
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2018-9336 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.