Ubuntu Security Notice 3225-1 – It was discovered that libarchive incorrectly handled hardlink entries when extracting archives. A remote attacker could possibly use this issue to overwrite arbitrary files. Christian Wressnegger, Alwin Maier, and Fabian Yamaguchi discovered that libarchive incorrectly handled filename lengths when writing ISO9660 archives. A remote attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. Various other issues were also addressed.