Double Free Affecting openvpn package, versions <2.3.10-1ubuntu2.1
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-UBUNTU1604-OPENVPN-345088
- published27 Jun 2017
- disclosed27 Jun 2017
Introduced: 27 Jun 2017
CVE-2017-7521 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 openvpn to version 2.3.10-1ubuntu2.1 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 Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
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().
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-7521
- https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243
- http://www.debian.org/security/2017/dsa-3900
- https://security-tracker.debian.org/tracker/CVE-2017-7521
- http://www.securityfocus.com/bid/99230
- http://www.securitytracker.com/id/1038768