=========================================================================Ubuntu Security Notice USN-2727-1
September 01, 2015

gnutls28 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.04

Summary:

GnuTLS could be made to crash or run programs if it processed a specially
crafted certificate.

Software Description:
- gnutls28: GNU TLS library

Details:

It was discovered that GnuTLS incorrectly handled parsing CRL distribution
points. A remote attacker could possibly use this issue to cause a denial
of service, or execute arbitrary code. (CVE-2015-3308)

Kurt Roeckx discovered that GnuTLS incorrectly handled a long
DistinguishedName (DN) entry in a certificate. A remote attacker could
possibly use this issue to cause a denial of service, or execute arbitrary
code. (CVE-2015-6251)

Update instructions:

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

Ubuntu 15.04:
  libgnutls-deb0-28               3.3.8-3ubuntu3.1

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

References:
  https://ubuntu.com/security/notices/USN-2727-1
  CVE-2015-3308, CVE-2015-6251

Package Information:
  https://launchpad.net/ubuntu/+source/gnutls28/3.3.8-3ubuntu3.1