CVE-2018-9336
openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
7.8
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.
- Record
CVE-2018-9336- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-415
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-9336- Updated
- 2026-11-02
EUVDEUVD-2018-20930 No score
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.
- Record
EUVD-2018-20930- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9p34-3252-9gh9
7.8
openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local...
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.
- Record
GHSA-9p34-3252-9gh9- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-415
- Updated
- 2026-11-02
OSVALPINE-CVE-2018-9336
7.8
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.
- Record
ALPINE-CVE-2018-9336- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV
7.8
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.
- Record
CVE-2018-9336- CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVMGASA-2018-0329 No score
Updated openvpn packages fix security vulnerability
Updated openvpn packages fix security vulnerability:
Fix potential double-free() in Interactive Service could lead to denial of service (CVE-2018-9336).
- Record
MGASA-2018-0329- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11128-1 No score
openvpn-2.5.3-1.2 on GA media
These are all security issues fixed in the openvpn-2.5.3-1.2 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11128-1- Updated
- 2026-11-02
OSVSUSE-SU-2018:1888-1 No score
Security update for openvpn
This update for openvpn fixes the following issues:
- CVE-2018-9336: Fix potential double-free() in Interactive Service could lead to denial of service (bsc#1090839).
- Record
SUSE-SU-2018:1888-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openvpnAlpine:v3.10 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.11 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.12 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.13 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.14 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.15 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.16 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.17 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.18 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.19 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
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| Package | Affected | Fixed |
|---|---|---|
openvpnAlpine:v3.20 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.21 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.22 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.23 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnAlpine:v3.24 |
2.4.0 up to 2.4.6-r0 | 2.4.6-r0 |
openvpnMageia:6 |
before 2.4.4-1.1.mga6 | 2.4.4-1.1.mga6 |
openvpnSUSE:Linux Enterprise Module for Basesystem 15 |
before 2.4.3-5.3.19 | 2.4.3-5.3.19 |
openvpnopenSUSE:Tumbleweed |
before 2.5.3-1.2 | 2.5.3-1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-9336 is a high vulnerability (CVSS 7.8) in Openvpn, published May 1, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. Fixed in openvpn 2.4.6-r0.
References
github.com/OpenVPN/openvpn/releases/tag/v2.4.6
slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761
tenable.com/security/research/tra-2018-09
github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b
community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24
nvd.nist.gov/vuln/detail/CVE-2018-9336
Show 17 moreShow less
github.com/advisories/GHSA-9p34-3252-9gh9
security.alpinelinux.org/vuln/CVE-2018-9336
advisories.mageia.org/MGASA-2018-0329.html
bugs.mageia.org/show_bug.cgi?id=23286
lists.suse.com/pipermail/sle-security-updates/2018-July/004246.html
suse.com/support/update/announcement/2018/suse-su-20181888-1
bugzilla.suse.com/1090839
suse.com/security/cve/CVE-2018-9336
suse.com/security/cve/CVE-2005-3393
suse.com/security/cve/CVE-2005-3409
suse.com/security/cve/CVE-2006-1629
suse.com/security/cve/CVE-2006-4339
suse.com/security/cve/CVE-2017-12166
suse.com/security/cve/CVE-2017-7521
suse.com/security/cve/CVE-2017-7522
suse.com/security/cve/CVE-2020-11810
suse.com/security/cve/CVE-2020-15078