NSS 3.42 release notes


The NSS team has released Network Security Services (NSS) 3.42 on 25 January 2019, which is a minor release.

Distribution Information

The HG tag is NSS_3_42_RTM. NSS 3.42 requires NSPR 4.20 or newer.

NSS 3.42 source distributions are available on ftp.mozilla.org for secure HTTPS download:

Other releases are available Release notes for recent versions of NSS.

New in NSS 3.42

New Functionality

New Functions

  • none

Notable Changes in NSS 3.42

  • The following CA certificates were Added:

    • None

  • The following CA certificates were Removed:

    • None

  • Added support for some of the test cases from the Wycheproof project:

    • Bug 1508666 - Added AES-GCM test cases

    • Bug 1508673 - Added ChaCha20-Poly1305 test cases

    • Bug 1514999 - Added the Curve25519 test cases

    • Thanks to Jonas Allmann for adapting these tests.

Bugs fixed in NSS 3.42

  • Bug 1490006 - Reject invalid CH.legacy_version in TLS 1.3

  • Bug 1507135[STRIKEOUT:and]Bug 1507174[STRIKEOUT:- Add additional null checks to several CMS functions to fix a rare CMS crash. Thanks to Hanno Böck and Damian Poddebniak for the discovery and fixes.] Note: This was mistakenly not in release 3.42, and is instead in NSS 3.42.1 release notes.

  • Bug 1513913 - A fix for Solaris where Firefox 60 core dumps during start when using profile from version 52

This Bugzilla query returns all the bugs fixed in NSS 3.42:



NSS 3.42 shared libraries are backward compatible with all older NSS 3.x shared libraries. A program linked with older NSS 3.x shared libraries will work with NSS 3.42 shared libraries without recompiling or relinking. Furthermore, applications that restrict their use of NSS APIs to the functions listed in NSS Public Functions will remain compatible with future versions of the NSS shared libraries.


Bugs discovered should be reported by filing a bug report with bugzilla.mozilla.org (product NSS).