ESB-2017.2483.2 - UPDATE [Ubuntu] libidn11: Denial of service - Remote with user interaction 2017-10-24

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.2483.2
                           Libidn vulnerability
                              24 October 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           libidn11
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-14062  

Reference:         ESB-2017.2467

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3434-1

Revision History:  October 24 2017: USN-3434-1 fixed a vulnerability in Libidn.
		 		    This update provides the corresponding 
				    update for Ubuntu 12.04 ESM
                   October  3 2017: Initial Release

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USN-3434-2: Libidn vulnerability

Ubuntu Security Notice USN-3434-2

23rd October, 2017
libidn vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

    Ubuntu 12.04 LTS

Summary

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

    libidn - implementation of IETF IDN specifications

Details

USN-3434-1 fixed a vulnerability in Libidn. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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.
Update instructions

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

Ubuntu 12.04 LTS:
    libidn11 1.23-2ubuntu0.2 

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-14062

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