Ubuntu 14.04 LTS USN-2676-1 Moderate NBD Denial of Service Issues

ubuntu

July 22, 2015

Several security issues were fixed in NBD.

Summary

Several security issues were fixed in NBD.

Software Description:

- nbd: Network Block Device protocol

Details:

It was discovered that NBD incorrectly handled IP address matching. A

remote attacker could use this issue with an IP address that has a partial

match and bypass access restrictions. This issue only affected

Ubuntu 12.04 LTS. (CVE-2013-6410)

Tuomas Räsänen discovered that NBD incorrectly handled wrong export names

and closed connections during negotiation. A remote attacker could use this

issue to cause NBD to crash, resulting in a denial of service. This issue

only affected Ubuntu 12.04 LTS. (CVE-2013-7441)

Tuomas Räsänen discovered that NBD incorrectly handled signals. A remote

attacker could use this issue to cause NBD to crash, resulting in a denial

of service. (CVE-2015-0847)

Topics Covered

security advisory denial of service moderate severity ubuntu nbd

Update Instructions

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

Ubuntu 15.04:
  nbd-server                      1:3.8-4ubuntu0.1

Ubuntu 14.10:
  nbd-server                      1:3.8-1ubuntu0.1

Ubuntu 14.04 LTS:
  nbd-server                      1:3.7-1ubuntu0.1

Ubuntu 12.04 LTS:
  nbd-server                      1:2.9.25-2ubuntu1.1

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