USN-4168-1: Libidn2 vulnerabilities

29 October 2019

libidn2 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.04
  • Ubuntu 18.04 LTS

Summary

Several security issues were fixed in Libidn2.

Software Description

  • libidn2 - Internationalized domain names (IDNA2008/TR46) command line tool

Details

It was discovered that Libidn2 incorrectly handled certain inputs. A attacker could possibly use this issue to impersonate domains. (CVE-2019-12290)

It was discovered that Libidn2 incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-18224)

Update instructions

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

Ubuntu 19.04
idn2 - 2.0.5-1ubuntu0.3
libidn2-0 - 2.0.5-1ubuntu0.3
Ubuntu 18.04 LTS
idn2 - 2.0.4-1.1ubuntu0.2
libidn2-0 - 2.0.4-1.1ubuntu0.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References