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USN-2676-1: NBD vulnerabilities

22 July 2015

Several security issues were fixed in NBD.

Releases

Packages

  • 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)

Update instructions

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

Ubuntu 15.04
Ubuntu 14.10
Ubuntu 14.04
Ubuntu 12.04

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