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Ubuntu Security Notice USN-4168-1
October 29, 2019
libidn2 vulnerabilities
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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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