Double Free in Openvpn
CVE-2017-7521
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (89.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Openvpn — versions 2.4.0, 2.4.1, 2.4.2
- Openvpn Technologies, Inc — versions before 2.3.17, before 2.4.3
Weakness classification (CWE)
References
- community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 (Vendor Advisory)
- www.securitytracker.com/id/1038768 (vdb-entry)
- www.securityfocus.com/bid/99230 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3900 (vendor-advisory)
Frequently asked questions
- What is CVE-2017-7521?
- CVE-2017-7521 is a medium-severity vulnerability in Openvpn, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2017-06-27.
- How severe is CVE-2017-7521?
- Medium severity. CVSS v3 base score is 5.9 out of 10.