CVE-2018-9336

Name: CVE-2018-9336
Creator: NVD / NIST
Published: 2018-05-01T18:29:00.697+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.61%

Last modified Jun 17, 2026

CVE-2018-9336 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.61%

44.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Openvpn	Openvpn	>= 2.4.0, < 2.4.6
Slackware	Slackware Linux	13.0
Slackware	Slackware Linux	13.1
Slackware	Slackware Linux	13.37
Slackware	Slackware Linux	14.0
Slackware	Slackware Linux	14.1

References

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761Mailing List, Third Party Advisory
https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24Release Notes, Vendor Advisory
https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79bPatch, Third Party Advisory
https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6Release Notes, Third Party Advisory
https://www.tenable.com/security/research/tra-2018-09Exploit, Third Party Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761Mailing List, Third Party Advisory
https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24Release Notes, Vendor Advisory
https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79bPatch, Third Party Advisory
https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6Release Notes, Third Party Advisory
https://www.tenable.com/security/research/tra-2018-09Exploit, Third Party Advisory

Timeline

Published: May 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-9336?

How severe is CVE-2018-9336?

Severity scoring for CVE-2018-9336 is pending analysis. The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2018-9336?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-9336?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST