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Ubuntu Security Notice USN-2559-1
April 08, 2015

libtasn1-3, libtasn1-6 vulnerability

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

• Ubuntu 14.10
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS
• Ubuntu 10.04 LTS

Summary:

Libtasn1 could be made to crash or run programs if it processed specially
crafted data.

Software Description:

• libtasn1-6: Library to manage ASN.1 structures
• libtasn1-3: Library to manage ASN.1 structures

Details:

Hanno Bock discovered that Libtasn1 incorrectly handled certain ASN.1 data.
A remote attacker could possibly exploit this with specially crafted ASN.1
data and cause applications using Libtasn1 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 versions:

Ubuntu 14.10:
libtasn1-6 4.0-2ubuntu0.1

Ubuntu 14.04 LTS:
libtasn1-6 3.4-3ubuntu0.2

Ubuntu 12.04 LTS:
libtasn1-3 2.10-1ubuntu1.3

Ubuntu 10.04 LTS:
libtasn1-3 2.4-1ubuntu0.3

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

References:
http://www.ubuntu.com/usn/usn-2559-1
CVE-2015-2806

Package Information:
https://launchpad.net/ubuntu/+source/libtasn1-6/4.0-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-6/3.4-3ubuntu0.2
https://launchpad.net/ubuntu/+source/libtasn1-3/2.10-1ubuntu1.3
https://launchpad.net/ubuntu/+source/libtasn1-3/2.4-1ubuntu0.3

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