==========================================================================
Ubuntu Security Notice USN-6727-2
April 11, 2024

nss regression
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

USN-6727-1 introduced a regression in NSS.

Software Description:
- nss: Network Security Service library

Details:

USN-6727-1 fixed vulnerabilities in NSS. The update introduced a regression
when trying to load security modules on Ubuntu 20.04 LTS and Ubuntu 22.04
LTS. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

  It was discovered that NSS incorrectly handled padding when checking PKCS#1
  certificates. A remote attacker could possibly use this issue to perform
  Bleichenbacher-like attacks and recover private data. This issue only
  affected Ubuntu 20.04 LTS. (CVE-2023-4421)
   It was discovered that NSS had a timing side-channel when performing RSA
  decryption. A remote attacker could possibly use this issue to recover
  private data. (CVE-2023-5388)
   It was discovered that NSS had a timing side-channel when using certain
  NIST curves. A remote attacker could possibly use this issue to recover
  private data. (CVE-2023-6135)
   The NSS package contained outdated CA certificates. This update refreshes
  the NSS package to version 3.98 which includes the latest CA certificate
  bundle and other security improvements.

Update instructions:

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

Ubuntu 22.04 LTS:
   libnss3                         2:3.98-0ubuntu0.22.04.2

Ubuntu 20.04 LTS:
   libnss3                         2:3.98-0ubuntu0.20.04.2

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

References:
   https://ubuntu.com/security/notices/USN-6727-2
   https://ubuntu.com/security/notices/USN-6727-1
   https://launchpad.net/bugs/2060906

Package Information:
   https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.2
   https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.20.04.2

Ubuntu 6727-2: NSS Security Advisory Updates

April 11, 2024
USN-6727-1 introduced a regression in NSS.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: USN-6727-1 introduced a regression in NSS. Software Description: - nss: Network Security Service library Details: USN-6727-1 fixed vulnerabilities in NSS. The update introduced a regression when trying to load security modules on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that NSS incorrectly handled padding when checking PKCS#1 certificates. A remote attacker could possibly use this issue to perform Bleichenbacher-like attacks and recover private data. This issue only affected Ubuntu 20.04 LTS. (CVE-2023-4421) It was discovered that NSS had a timing side-channel when performing RSA decryption. A remote attacker could possibly use this issue to recover private data. (CVE-2023-5388) It was discovered that NSS had a timing side-channel when using certain NIST curves. A remote attacker could possibly use this issue to recover private data. (CVE-2023-6135) The NSS package contained outdated CA certificates. This update refreshes the NSS package to version 3.98 which includes the latest CA certificate bundle and other security improvements.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: libnss3 2:3.98-0ubuntu0.22.04.2 Ubuntu 20.04 LTS: libnss3 2:3.98-0ubuntu0.20.04.2 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-6727-2

https://ubuntu.com/security/notices/USN-6727-1

https://launchpad.net/bugs/2060906

Severity
Ubuntu Security Notice USN-6727-2

Package Information

https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.2 https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.20.04.2

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