Ubuntu Security Notice USN-3421-1
18th September, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 17.04
Libidn2 could be made to crash if it received specially crafted
– 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.
The problem can be corrected by updating your system to the following
To update your system, please follow these instructions:
In general, a standard system update will make all the necessary changes.