========================================================================== 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://www.ubuntu.com/usn/usn-3434-2 https://www.ubuntu.com/usn/usn-3434-1 CVE-2017-14062
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