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.
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Ubuntu Security Notice USN-2957-2
May 02, 2016
libtasn1-6 vulnerability
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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