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Ubuntu Security Notice USN-3434-2

Ubuntu Security Notice USN-3434-2
Posted Oct 24, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3434-2 - USN-3434-1 fixed a vulnerability inA A Libidn. This update provides the corresponding update for Ubuntu 12.04 ESM. A It was discovered that Libidn incorrectly handled decoding certain A digits. A remote attacker could use this issue to cause Libidn to A crash, resulting in a denial of service, or possibly execute arbitrary A code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
MD5 | 7223865ac706e78e879919d526ab403c

Ubuntu Security Notice USN-3434-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3434-2
October 23, 2017

libidn vulnerability
==========================================================================

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

- Ubuntu 12.04 ESM

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 inA A Libidn. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

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

Update instructions:

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

Ubuntu 12.04 ESM:
A libidn11A A A A A A A A A A A A A A A A A A A A A A A A 1.23-2ubuntu0.2

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

References:
A https://www.ubuntu.com/usn/usn-3434-2
A https://www.ubuntu.com/usn/usn-3434-1
A CVE-2017-14062

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