USN-3427-1: Emacs vulnerability

21 September 2017

emacs24 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Emacs could be made to run programs as your login if it opened a specially crafted file.

Software Description

  • emacs24 - GNU Emacs editor


Charles A. Roelli discovered that Emacs incorrectly handled certain files. If a user were tricked into opening a specially crafted file (e.g., email messages in gnus), an attacker could possibly use this to execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04 LTS
emacs24 - 24.5+1-6ubuntu1.1
Ubuntu 14.04 LTS
emacs24 - 24.3+1-2ubuntu1.1

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.