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Ubuntu Security Notice USN-1436-1

Ubuntu Security Notice USN-1436-1
Posted May 2, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1436-1 - Matthew Hall discovered that Libtasn1 incorrectly handled certain large values. An attacker could exploit this with a specially crafted ASN.1 structure and cause a denial of service, or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2012-1569
MD5 | 86f698b5592eaa11dc0bc8b17bd06ca6

Ubuntu Security Notice USN-1436-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-1436-1
May 02, 2012

libtasn1-3 vulnerability
==========================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

Libtasn1 could be made to crash or run programs as your login if it
received specially crafted input.

Software Description:
- libtasn1-3: Library to manage ASN.1 structures

Details:

Matthew Hall discovered that Libtasn1 incorrectly handled certain large
values. An attacker could exploit this with a specially crafted ASN.1
structure and cause 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 12.04 LTS:
libtasn1-3 2.10-1ubuntu1.1

Ubuntu 11.10:
libtasn1-3 2.9-4ubuntu0.1

Ubuntu 11.04:
libtasn1-3 2.7-1ubuntu1.1

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

Ubuntu 8.04 LTS:
libtasn1-3 1.1-1ubuntu0.1

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

References:
http://www.ubuntu.com/usn/usn-1436-1
CVE-2012-1569

Package Information:
https://launchpad.net/ubuntu/+source/libtasn1-3/2.10-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.9-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.7-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.4-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-3/1.1-1ubuntu0.1


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