USN-3547-1: Libtasn1 vulnerabilities

Ubuntu Security Notice USN-3547-1

25th January, 2018

libtasn1-6 vulnerabilities

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

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Libtasn1.

Software description

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

Details

It was discovered that Libtasn1 incorrectly handled certain files.
If a user were tricked into opening a crafted file, an attacker could possibly
use this to cause a denial of service. This issue only affected Ubuntu 14.04
LTS and Ubuntu 16.04 LTS. (CVE-2017-10790)

It was discovered that Libtasn1 incorrectly handled certain inputs.
An attacker could possibly use this to cause Libtasn1 to hang, resulting
in a denial of service. This issue only affected Ubuntu 16.04 LTS and
Ubuntu 17.10. (CVE-2018-6003)

Update instructions

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

Ubuntu 17.10:
libtasn1-6 4.12-2.1ubuntu0.1
Ubuntu 16.04 LTS:
libtasn1-6 4.7-3ubuntu0.16.04.3
Ubuntu 14.04 LTS:
libtasn1-6 3.4-3ubuntu0.6

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.

References

CVE-2017-10790, CVE-2018-6003