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Ubuntu Security Notice USN-6304-1
August 22, 2023

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

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Inetutils could be made to crash or execute arbitrary code.

Software Description:
- inetutils: File Transfer Protocol client

Details:

It was discovered that telnetd in GNU Inetutils incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a crash.  This issue
only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS (CVE-2022-39028)

It was discovered that Inetutils incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information,
or execute arbitrary code.
(CVE-2023-40303)

Update instructions:

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

Ubuntu 23.04:
  inetutils-telnetd               2:2.4-2ubuntu1.1
  inetutils-tools                 2:2.4-2ubuntu1.1

Ubuntu 22.04 LTS:
  inetutils-telnetd               2:2.2-2ubuntu0.1
  inetutils-tools                 2:2.2-2ubuntu0.1

Ubuntu 20.04 LTS:
  inetutils-telnetd               2:1.9.4-11ubuntu0.2
  inetutils-tools                 2:1.9.4-11ubuntu0.2

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

References:
  https://ubuntu.com/security/notices/USN-6304-1
  CVE-2022-39028, CVE-2023-40303

Package Information:
  https://launchpad.net/ubuntu/+source/inetutils/2:2.4-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/inetutils/2:2.2-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/inetutils/2:1.9.4-11ubuntu0.2