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Ubuntu Security Notice USN-2957-2

Ubuntu Security Notice USN-2957-2
Posted May 2, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2957-2 - USN-2957-1 fixed a vulnerability in Libtasn1. This update provides the corresponding update for Ubuntu 16.04 LTS. Pascal Cuoq and Miod Vallat discovered that Libtasn1 incorrectly handled certain malformed DER certificates. A remote attacker could possibly use this issue to cause applications using Libtasn1 to hang, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2016-4008
SHA-256 | c33eee1719d4d2b6b1e4d7568f56ee34ddadfeeda6aa155fa8494cd00e22fd1c

Ubuntu Security Notice USN-2957-2

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2957-2
May 02, 2016

libtasn1-6 vulnerability
============================================================================

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

- Ubuntu 16.04 LTS

Summary:

Libtasn1 could be made to hang if it processed specially crafted data.

Software Description:
- libtasn1-6: Library to manage ASN.1 structures

Details:

USN-2957-1 fixed a vulnerability in Libtasn1. This update provides the
corresponding update for Ubuntu 16.04 LTS.

Original advisory details:

Pascal Cuoq and Miod Vallat discovered that Libtasn1 incorrectly handled
certain malformed DER certificates. A remote attacker could possibly use
this issue to cause applications using Libtasn1 to hang, resulting in a
denial of service.

Update instructions:

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

Ubuntu 16.04 LTS:
libtasn1-6 4.7-3ubuntu0.16.04.1

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

References:
http://www.ubuntu.com/usn/usn-2957-2
http://www.ubuntu.com/usn/usn-2957-1
CVE-2016-4008

Package Information:
https://launchpad.net/ubuntu/+source/libtasn1-6/4.7-3ubuntu0.16.04.1
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