==========================================================================
Ubuntu Security Notice USN-6727-1
April 10, 2024

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

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in NSS.

Software Description:
- nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled 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The NSS package contained outdated CA certificates.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 23.10:
   libnss3                         2:3.98-0ubuntu0.23.10.1

Ubuntu 22.04 LTS:
   libnss3                         2:3.98-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
   libnss3                         2:3.98-0ubuntu0.20.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
   https://ubuntu.com/security/notices/USN-6727-1
   CVE-2023-4421, CVE-2023-5388, CVE-2023-6135

Package Information:
   https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.23.10.1
   https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.1
   https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.20.04.1

Ubuntu 6727-1: NSS vulnerabilities

April 10, 2024
Several security issues were fixed in NSS.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in NSS. Software Description: - nss: Network Security Service library Details: It was discovered that NSS incorrectly handled 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 23.10: libnss3 2:3.98-0ubuntu0.23.10.1 Ubuntu 22.04 LTS: libnss3 2:3.98-0ubuntu0.22.04.1 Ubuntu 20.04 LTS: libnss3 2:3.98-0ubuntu0.20.04.1 This update uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes.

References

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

CVE-2023-4421, CVE-2023-5388, CVE-2023-6135

Severity
Ubuntu Security Notice USN-6727-1

Package Information

https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.23.10.1 https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.1 https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.20.04.1

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