Ubuntu Security Notice 2456-1 – Michal Zalewski discovered an out of bounds write issue in the process_copy_in function of GNU cpio. An attacker could specially craft a cpio archive that could create a denial of service or possibly execute arbitrary code. Jakob Lell discovered a heap-based buffer overflow in the rmt_read__ function of GNU cpio’s rmt client functionality. An attacker controlling a remote rmt server could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 10.04 LTS. Various other issues were also addressed.