Published: 01 October 2018

Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which either a plugin or the uninstaller can be replaced by a Trojan horse program.

From the Ubuntu security team

It was discovered that NSIS incorrectly handled temporary folders. An attacker could possibly use this issue to execute arbitrary commands.



CVSS 3 base score: 5.5


Package Release Status
Launchpad, Ubuntu, Debian
Released (2.49)
Ubuntu 21.10 (Impish Indri) Not vulnerable
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
Ubuntu 14.04 ESM (Trusty Tahr) Needed