==========================================================================
Ubuntu Security Notice USN-5892-1
February 27, 2023

nss vulnerabilities
==========================================================================

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in NSS.

Software Description:
- nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled client authentication
without a user certificate in the database. A remote attacker could
possibly use this issue to cause a NSS client to crash, resulting in a
denial of service. This issue only affected Ubuntu 22.10. (CVE-2022-3479)

Christian Holler discovered that NSS incorrectly handled certain PKCS 12
certificated bundles. A remote attacker could use this issue to cause NSS
to crash, leading to a denial of service, or possibly execute arbitrary
code. (CVE-2023-0767)

Update instructions:

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

Ubuntu 22.10:
   libnss3                         2:3.82-1ubuntu0.1

Ubuntu 22.04 LTS:
   libnss3                         2:3.68.2-0ubuntu1.2

Ubuntu 20.04 LTS:
   libnss3                         2:3.49.1-1ubuntu1.9

Ubuntu 18.04 LTS:
   libnss3                         2:3.35-2ubuntu2.16

After a standard system update you need to restart any applications that
use NSS to make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-5892-1
   CVE-2022-3479, CVE-2023-0767

Package Information:
   https://launchpad.net/ubuntu/+source/nss/2:3.82-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/nss/2:3.68.2-0ubuntu1.2
   https://launchpad.net/ubuntu/+source/nss/2:3.49.1-1ubuntu1.9
   https://launchpad.net/ubuntu/+source/nss/2:3.35-2ubuntu2.16