Ubuntu Security Notice USN-3434-2
23rd October, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 12.04 LTS
Libidn could be made to crash or run programs if it processed specially
– implementation of IETF IDN specifications
USN-3434-1 fixed a vulnerability in Libidn. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn to crash, resulting
in a denial of service, or possibly execute arbitrary code.
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.