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Ubuntu 19.04 & 18.04 LTS: USN-4168-1 Critical Libidn2 Issues

ubuntu
Calendar Grey October 29, 2019
Dist Ubuntu Esm H88
Recent updates for Ubuntu systems have fixed critical vulnerabilities in Libidn2. Detailed information on the updates and related risks is available
Several security issues were fixed in Libidn2.

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)

Topics%20covered

Topics Covered

security advisory arbitrary code execution Ubuntu impersonation Libidn2

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://ubuntu.com/security/notices/USN-4168-1

CVE-2019-12290, CVE-2019-18224

Severity
critical
Lowest
Low
Medium
High
Critical

October 29, 2019

Topics%20covered

Topics Covered

security advisory arbitrary code execution Ubuntu impersonation Libidn2

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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