USN-2676-1: NBD vulnerabilities

Releases

• Ubuntu 15.04
• Ubuntu 14.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

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

• nbd-server - 1:3.8-4ubuntu0.1

Ubuntu 14.10

• nbd-server - 1:3.8-1ubuntu0.1

Ubuntu 14.04

• nbd-server - 1:3.7-1ubuntu0.1

Ubuntu 12.04

• nbd-server - 1:2.9.25-2ubuntu1.1

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

References

• CVE-2013-6410
• CVE-2013-7441
• CVE-2015-0847