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7.8
HIGH CVSS 3.0
CVE-2018-9336
OpenVPN Double-Free Memory Corruption Vulnerability
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.

INFO

Published Date :

May 1, 2018, 6:29 p.m.

Last Modified :

Nov. 21, 2024, 4:15 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2018-9336 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Openvpn openvpn
1 Slackware slackware_linux
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 HIGH [email protected]
Solution
A double-free memory corruption vulnerability exists in OpenVPN, which could allow for denial-of-service or privilege escalation.
  • Upgrade to OpenVPN 2.4.6 or later.
  • Apply the appropriate vendor-provided patch.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2018-9336.

URL Resource
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 Mailing List Third Party Advisory
https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 Release Notes Vendor Advisory
https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b Patch Third Party Advisory
https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 Release Notes Third Party Advisory
https://www.tenable.com/security/research/tra-2018-09 Exploit Third Party Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 Mailing List Third Party Advisory
https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 Release Notes Vendor Advisory
https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b Patch Third Party Advisory
https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 Release Notes Third Party Advisory
https://www.tenable.com/security/research/tra-2018-09 Exploit Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2018-9336 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2018-9336 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2018-9336 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2018-9336 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761
    Added Reference https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24
    Added Reference https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b
    Added Reference https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6
    Added Reference https://www.tenable.com/security/research/tra-2018-09
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 13, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:L/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b No Types Assigned https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b Patch, Third Party Advisory
    Changed Reference Type https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 No Types Assigned https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 Release Notes, Third Party Advisory
    Changed Reference Type https://www.tenable.com/security/research/tra-2018-09 No Types Assigned https://www.tenable.com/security/research/tra-2018-09 Exploit, Third Party Advisory
    Changed Reference Type https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 No Types Assigned https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 Release Notes, Vendor Advisory
    Changed Reference Type http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 No Types Assigned http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 Mailing List, Third Party Advisory
    Added CWE CWE-415
    Added CPE Configuration OR *cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* versions from (including) 2.4.0 up to (excluding) 2.4.6
    Added CPE Configuration OR *cpe:2.3:o:slackware:slackware_linux:13.0:*:*:*:*:*:*:* *cpe:2.3:o:slackware:slackware_linux:13.1:*:*:*:*:*:*:* *cpe:2.3:o:slackware:slackware_linux:13.37:*:*:*:*:*:*:* *cpe:2.3:o:slackware:slackware_linux:14.0:*:*:*:*:*:*:* *cpe:2.3:o:slackware:slackware_linux:14.1:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    May. 06, 2018

    Action Type Old Value New Value
    Added Reference https://www.tenable.com/security/research/tra-2018-09 [No Types Assigned]
  • CVE Modified by [email protected]

    May. 02, 2018

    Action Type Old Value New Value
    Removed Reference http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 [No Types Assigned]
    Added Reference http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4.6
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} -0.00%

score

0.22301

percentile