CVE-2018-9336 — openvpnserv
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 u
Published
2018-05-01T18:00:00.000Z
Last modified
2024-08-05T07:17:52.100Z
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2018-05-01T18:00:00.000Z
- Last modified: 2024-08-05T07:17:52.100Z
09References
- github.com — https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6
- www.slackware.com — http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slack…
- www.tenable.com — https://www.tenable.com/security/research/tra-2018-09
- github.com — https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e7…
- community.openvpn.net — https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24
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