Ubuntu Security Notice USN-2957-1
2nd May, 2016
libtasn1-3, libtasn1-6 vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Libtasn1 could be made to hang if it processed specially crafted data.
Software description
- libtasn1-3
– Library to manage ASN.1 structures - libtasn1-6
– Library to manage ASN.1 structures
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 version:
- Ubuntu 15.10:
-
libtasn1-6
4.5-2ubuntu0.1
- Ubuntu 14.04 LTS:
-
libtasn1-6
3.4-3ubuntu0.4
- Ubuntu 12.04 LTS:
-
libtasn1-3
2.10-1ubuntu1.5
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.