USN-4168-1: Libidn2 vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.04 ESM

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)

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

• 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

• CVE-2019-12290
• CVE-2019-18224