USN-5323-1: NBD vulnerabilities

Releases

• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• 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

• nbd-server - 1:3.20-1ubuntu0.1

Ubuntu 18.04

• nbd-server - 1:3.16.2-1ubuntu0.2

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

References

• CVE-2022-26496
• CVE-2022-26495