Ubuntu Security Notices
USN-4168-1

USN-4168-1: Libidn2 vulnerabilities

Publication date

29 October 2019

Overview

Several security issues were fixed in Libidn2.

Releases

19.04 18.04 LTS

Packages

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
19.04 disco	idn2 – 2.0.5-1ubuntu0.3
19.04 disco	libidn2-0 – 2.0.5-1ubuntu0.3
18.04 bionic	idn2 – 2.0.4-1.1ubuntu0.2
18.04 bionic	libidn2-0 – 2.0.4-1.1ubuntu0.2

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USN-4168-1: Libidn2 vulnerabilities

Packages

Details

Update instructions

Reduce your security exposure

References