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Ubuntu: USN-5323-1 Critical: NBD Denial of Service Risk

ubuntu
Calendar Grey March 14, 2022
Dist Ubuntu Esm H88
A number of vulnerabilities related to NBD have been addressed in Ubuntu, reducing risks that could lead to Denial of Service and remote code execution.
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 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.

Topics%20covered

Topics Covered

security advisory denial of service security issue software update Ubuntu remote execution NBD

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

Severity
critical
Lowest
Low
Medium
High
Critical

March 14, 2022

Topics%20covered

Topics Covered

security advisory denial of service security issue software update Ubuntu remote execution NBD

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

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