USN-3421-1: Libidn2 vulnerability

18 September 2017

Libidn2 could be made to crash if it received specially crafted input.



  • libidn2-0 - Internationalized domain names (IDNA2008) library


It was discovered that Libidn2 incorrectly handled certain input. A
remote attacker could possibly use this issue to cause Libidn2 to crash,
resulting in a denial of service.

Update instructions

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

Ubuntu 17.04

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


Related notices