==========================================================================
Ubuntu Security Notice USN-3397-1
August 21, 2017
strongswan vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 17.04
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS
Summary:
strongSwan could be made to crash or hang if it received specially
crafted network traffic.
Software Description:
– strongswan: IPsec VPN solution
Details:
It was discovered that strongSwan incorrectly handled verifying
specific RSA signatures. A remote attacker could use this issue
to cause strongSwan to crash, resulting in a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
libstrongswan 5.5.1-1ubuntu3.2
strongswan 5.5.1-1ubuntu3.2
Ubuntu 16.04 LTS:
libstrongswan 5.3.5-1ubuntu3.4
strongswan 5.3.5-1ubuntu3.4
Ubuntu 14.04 LTS:
libstrongswan 5.1.2-0ubuntu2.7
strongswan 5.1.2-0ubuntu2.7
In general, a standard system update will make all the necessary
changes.
References:
https://www.ubuntu.com/usn/usn-3397-1
CVE-2017-11185
Package Information:
https://launchpad.net/ubuntu/+source/strongswan/5.5.1-1ubuntu3.2
https://launchpad.net/ubuntu/+source/strongswan/5.3.5-1ubuntu3.4
https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu2.7
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