1. Ubuntu Security Notices
  2. USN-1436-1

USN-1436-1: Libtasn1 vulnerability

Publication date

2 May 2012

Overview

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

Releases

Packages

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
8.04 hardy libtasn1-3 –  1.1-1ubuntu0.1
12.04 precise libtasn1-3 –  2.10-1ubuntu1.1
11.10 oneiric libtasn1-3 –  2.9-4ubuntu0.1
11.04 natty libtasn1-3 –  2.7-1ubuntu1.1
10.04 lucid libtasn1-3 –  2.4-1ubuntu0.1

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›