========================================================================== Ubuntu Security Notice USN-3774-1 October 01, 2018 strongswan vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: strongSwan could be made to crash or run programs if it received specially crafted network traffic. Software Description: - strongswan: IPsec VPN solution Details: It was discovered that strongSwan incorrectly handled signature validation in the gmp plugin. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: libstrongswan 5.6.2-1ubuntu2.3 strongswan 5.6.2-1ubuntu2.3 Ubuntu 16.04 LTS: libstrongswan 5.3.5-1ubuntu3.8 strongswan 5.3.5-1ubuntu3.8 Ubuntu 14.04 LTS: libstrongswan 5.1.2-0ubuntu2.11 strongswan 5.1.2-0ubuntu2.11 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3774-1 CVE-2018-17540 Package Information: https://launchpad.net/ubuntu/+source/strongswan/5.6.2-1ubuntu2.3 https://launchpad.net/ubuntu/+source/strongswan/5.3.5-1ubuntu3.8 https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu2.11