Double Free Affecting openvpn package, versions <2.4.6-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE322-OPENVPN-10278989
- published31 May 2025
- disclosed1 May 2018
Introduced: 1 May 2018
CVE-2018-9336 (opens in a new tab)How to fix?
Upgrade Alpine:3.22 openvpn to version 2.4.6-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openvpn package and not the openvpn package as distributed by Alpine.
See How to fix? for Alpine:3.22 relevant fixed versions and status.
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.
References
- 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