1. Ubuntu Security Notices
  2. USN-3434-1

USN-3434-1: Libidn vulnerability

Publication date

2 October 2017

Overview

Libidn could be made to crash or run programs if it processed specially crafted input.

Releases

Packages

  • libidn - implementation of IETF IDN specifications

Details

It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn to crash, resulting
in a denial of service, or possibly execute arbitrary code.

It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn to crash, resulting
in a denial of service, or possibly execute arbitrary code.

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
17.04 zesty libidn11 –  1.33-1ubuntu0.1
16.04 xenial libidn11 –  1.32-3ubuntu1.2
14.04 trusty libidn11 –  1.28-1ubuntu2.2

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References

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