=========================================================================Ubuntu Security Notice USN-3434-2
October 23, 2017
libidn vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Libidn could be made to crash or run programs if it processed specially
crafted input.
Software Description:
- libidn: implementation of IETF IDN specifications
Details:
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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
libidn11 1.23-2ubuntu0.2
In general, a standard system update will make all the necessary
changes.
References:
https://ubuntu.com/security/notices/USN-3434-2
https://ubuntu.com/security/notices/USN-3434-1
CVE-2017-14062
