Double Free in Openvpn
CVE-2018-9336
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.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000
Affected products
- Openvpn
- Slackware Linux — versions 13.0, 13.1, 13.37
Weakness classification (CWE)
References
- github.com/OpenVPN/openvpn/releases/tag/v2.4.6 (Third Party Advisory, Release Notes)
- www.slackware.com/security/viewer.php (vendor-advisory, Mailing List, Third Party Advisory)
- www.tenable.com/security/research/tra-2018-09 (Exploit, Third Party Advisory)
- github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b (Patch, Third Party Advisory)
- community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-9336?
- CVE-2018-9336 is a high-severity vulnerability in Openvpn, classified under Double Free. CVSS score: 7.8/10. Published 2018-05-01.
- How severe is CVE-2018-9336?
- High severity. CVSS v3 base score is 7.8 out of 10.