A CUPS security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.10, and 22.04 LTS.

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Ubuntu Security Notice USN-5454-1
May 31, 2022

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

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in CUPS.

Software Description:
- cups: Common UNIX Printing System(tm)

Details:

Joshua Mason discovered that CUPS incorrectly handled the secret key used
to access the administrative web interface. A remote attacker could
possibly use this issue to open a session as an administrator and execute
arbitrary code. (CVE-2022-26691)

It was discovered that CUPS incorrectly handled certain memory operations
when handling IPP printing. A remote attacker could possibly use this issue
to cause CUPS to crash, leading to a denial of service, or obtain sensitive
information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04
LTS. (CVE-2019-8842, CVE-2020-10001)

Update instructions:

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

Ubuntu 22.04 LTS:
cups 2.4.1op1-1ubuntu4.1

Ubuntu 21.10:
cups 2.3.3op2-7ubuntu2.1

Ubuntu 20.04 LTS:
cups 2.3.1-9ubuntu1.2

Ubuntu 18.04 LTS:
cups 2.2.7-1ubuntu2.9

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

References:
  https://ubuntu.com/security/notices/USN-5454-1
CVE-2019-8842, CVE-2020-10001, CVE-2022-26691

Package Information:
  https://launchpad.net/ubuntu/+source/cups/2.4.1op1-1ubuntu4.1
  https://launchpad.net/ubuntu/+source/cups/2.3.3op2-7ubuntu2.1
  https://launchpad.net/ubuntu/+source/cups/2.3.1-9ubuntu1.2
  https://launchpad.net/ubuntu/+source/cups/2.2.7-1ubuntu2.9