CVE-2017-7521: Double Free
First published: Tue Jun 27 2017(Updated: )
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().
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenVPN Monitor | <=2.3.16 | |
| OpenVPN Monitor | =2.4.0 | |
| OpenVPN Monitor | =2.4.0-alpha2 | |
| OpenVPN Monitor | =2.4.0-beta1 | |
| OpenVPN Monitor | =2.4.0-beta2 | |
| OpenVPN Monitor | =2.4.0-rc1 | |
| OpenVPN Monitor | =2.4.0-rc2 | |
| OpenVPN Monitor | =2.4.1 | |
| OpenVPN Monitor | =2.4.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2017-7521?
CVE-2017-7521 is classified as a remote denial-of-service vulnerability due to memory exhaustion.
How do I fix CVE-2017-7521?
To fix CVE-2017-7521, upgrade to OpenVPN version 2.4.3 or later, or 2.3.17 or later.
Which versions of OpenVPN are affected by CVE-2017-7521?
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to CVE-2017-7521.
Can CVE-2017-7521 be exploited remotely?
Yes, CVE-2017-7521 can be exploited remotely, leading to a denial of service by causing memory exhaustion.
What impact does CVE-2017-7521 have on OpenVPN users?
CVE-2017-7521 can cause instability and downtime for OpenVPN services, affecting users' ability to connect.
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- agent/event
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/openvpn
- canonical/openvpn monitor
- version/openvpn monitor/2.3.16
- version/openvpn monitor/2.4.0
- version/openvpn monitor/2.4.0-alpha2
- version/openvpn monitor/2.4.0-beta1
- version/openvpn monitor/2.4.0-beta2
- version/openvpn monitor/2.4.0-rc1
- version/openvpn monitor/2.4.0-rc2
- version/openvpn monitor/2.4.1
- version/openvpn monitor/2.4.2