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.

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.

Vulnerability/
CVE-2017-7521

medium

5.9

CWE

415 772 400

27/6/2017

3/10/2019

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 OpenVPN	<=2.3.16
OpenVPN OpenVPN	=2.4.0
OpenVPN OpenVPN	=2.4.0-alpha2
OpenVPN OpenVPN	=2.4.0-beta1
OpenVPN OpenVPN	=2.4.0-beta2
OpenVPN OpenVPN	=2.4.0-rc1
OpenVPN OpenVPN	=2.4.0-rc2
OpenVPN OpenVPN	=2.4.1
OpenVPN OpenVPN	=2.4.2

Never miss a vulnerability like this again

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.

agent/weakness
agent/severity
agent/references
agent/author
agent/type
agent/event
agent/softwarecombine
agent/first-publish-date
agent/last-modified-date
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
agent/description
vendor/openvpn
canonical/openvpn openvpn
version/openvpn openvpn/2.3.16
version/openvpn openvpn/2.4.0
version/openvpn openvpn/2.4.0-alpha2
version/openvpn openvpn/2.4.0-beta1
version/openvpn openvpn/2.4.0-beta2
version/openvpn openvpn/2.4.0-rc1
version/openvpn openvpn/2.4.0-rc2
version/openvpn openvpn/2.4.1
version/openvpn openvpn/2.4.2

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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.

CVE-2017-7521: Double Free

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2017-7521?

How do I fix CVE-2017-7521?

Which versions of OpenVPN are affected by CVE-2017-7521?

Can CVE-2017-7521 be exploited remotely?

What impact does CVE-2017-7521 have on OpenVPN users?

Company

Resources

Contact

Frequently Asked Questions

What is the severity of CVE-2017-7521?

How do I fix CVE-2017-7521?

Which versions of OpenVPN are affected by CVE-2017-7521?

Can CVE-2017-7521 be exploited remotely?

What impact does CVE-2017-7521 have on OpenVPN users?