Ubuntu Security Notice USN-2676-1
22nd July, 2015
nbd vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 15.04
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
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)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- 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
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.