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Ubuntu Security Notice USN-3284-1
May 11, 2017

openvpn vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

Summary:

Several security issues were fixed in OpenVPN.

Software Description:
- openvpn: virtual private network software

Details:

It was discovered that OpenVPN improperly triggered an assert when
receiving an oversized control packet in some situations. A remote
attacker could use this to cause a denial of service (server or client
crash). (CVE-2017-7478)

It was discovered that OpenVPN improperly triggered an assert when packet
ids rolled over. An authenticated remote attacker could use this to cause a
denial of service (application crash). (CVE-2017-7479)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  openvpn                         2.4.0-4ubuntu1.2

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-3284-1
  CVE-2017-7478, CVE-2017-7479

Package Information:
  https://launchpad.net/ubuntu/+source/openvpn/2.4.0-4ubuntu1.2