CVE-2018-6557 – Insecure temporary file use in base-files

https://notcve.org/view.php?id=CVE-2018-6557

21 Aug 2018 — The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled. El script de actualización de MOTD en el paquete de archivos base en Ubuntu 18.04 LTS en versiones anteriores a la 10.1ubuntu2.2 y Ubuntu 18.10 anteriores a la 10.1ubuntu6 manejaba incorrectamente los a... • http://www.securityfocus.com/bid/105148 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •