Ubuntu Security Notice USN-5323-1

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Ubuntu Security Notice USN-5323-1
March 14, 2022

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

– Ubuntu 21.10
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in NBD.

Software Description:
– nbd: Network Block Device protocol

Details:

It was discovered that NBD incorrectly handled name length fields. A remote
attacker could use this issue to cause NBD to crash, resulting in a denial
of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 21.10:
nbd-server 1:3.21-1ubuntu0.1

Ubuntu 20.04 LTS:
nbd-server 1:3.20-1ubuntu0.1

Ubuntu 18.04 LTS:
nbd-server 1:3.16.2-1ubuntu0.2

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

References:
https://ubuntu.com/security/notices/USN-5323-1
CVE-2022-26495, CVE-2022-26496

Package Information:
https://launchpad.net/ubuntu/+source/nbd/1:3.21-1ubuntu0.1
https://launchpad.net/ubuntu/+source/nbd/1:3.20-1ubuntu0.1
https://launchpad.net/ubuntu/+source/nbd/1:3.16.2-1ubuntu0.2