========================================================================== Ubuntu Security Notice USN-4168-1 October 29, 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 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4168-1 CVE-2019-12290, CVE-2019-18224 Package Information: https://launchpad.net/ubuntu/+source/libidn2/2.0.5-1ubuntu0.3 https://launchpad.net/ubuntu/+source/libidn2/2.0.4-1.1ubuntu0.2
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