========================================================================== Ubuntu Security Notice USN-3431-1 October 02, 2017 nss vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: NSS could be made to crash or run programs if it received specially crafted network traffic. Software Description: - nss: Network Security Service library Details: Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could use this issue to cause NSS 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 17.04: libnss3 2:3.28.4-0ubuntu0.17.04.3 Ubuntu 16.04 LTS: libnss3 2:3.28.4-0ubuntu0.16.04.3 Ubuntu 14.04 LTS: libnss3 2:3.28.4-0ubuntu0.14.04.3 After a standard system update you need to restart any applications that use NSS, such as Evolution and Chromium, to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3431-1 CVE-2017-7805 Package Information: https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.17.04.3 https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.3 https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.14.04.3