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# NSS 3.42 release notes

## [Introduction](#introduction)

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The NSS team has released Network Security Services (NSS) 3.42 on 25 January 2019, which is a
minor release.
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## [Distribution Information](#distribution_information)

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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:

- Source tarballs:
  <https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_42_RTM/src/>

Other releases are available {ref}`mozilla_projects_nss_nss_releases`.
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(new-in-nss-3-42)=

## [New in NSS 3.42](#new_in_nss_3.42)

### [New Functionality](#new_functionality)

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- [Bug 818686](https://bugzilla.mozilla.org/show_bug.cgi?id=818686) - Support XDG basedir
  specification

```{rubric} New Functions
```

- none
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(notable-changes-in-nss-3-42)=

## [Notable Changes in NSS 3.42](#notable_changes_in_nss_3.42)

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- 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](https://github.com/google/wycheproof):

  - [Bug 1508666](https://bugzilla.mozilla.org/show_bug.cgi?id=1508666) - Added AES-GCM test
    cases
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    [Bug 1508673](https://bugzilla.mozilla.org/show_bug.cgi?id=1508673) - Added
    ChaCha20-Poly1305 test cases
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    ::::
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  - :::::{container} field indent

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    [Bug 1514999](https://bugzilla.mozilla.org/show_bug.cgi?id=1514999) - Added the
    Curve25519 test cases
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  - Thanks to Jonas Allmann for adapting these tests.
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## [Bugs fixed in NSS 3.42](#bugs_fixed_in_nss_3.42)

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- [Bug 1490006](https://bugzilla.mozilla.org/show_bug.cgi?id=1490006) - Reject invalid
  CH.legacy_version in TLS 1.3
- [Bug 1507135][https://bugzilla.mozilla.org/show_bug.cgi?id=1507135](STRIKEOUT:and)[Bug
  1507174](https://bugzilla.mozilla.org/show_bug.cgi?id=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 {ref}`mozilla_projects_nss_nss_3_42_1_release_notes`.
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  [Bug 1513913](https://bugzilla.mozilla.org/show_bug.cgi?id=1513913) - A fix for
  Solaris where Firefox 60 core dumps during start when using profile from version 52
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This Bugzilla query returns all the bugs fixed in NSS 3.42:

<https://bugzilla.mozilla.org/buglist.cgi?resolution=FIXED&classification=Components&query_format=advanced&product=NSS&target_milestone=3.42>
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## [Compatibility](#compatibility)

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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.
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## [Feedback](#feedback)

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Bugs discovered should be reported by filing a bug report with
[bugzilla.mozilla.org](https://bugzilla.mozilla.org/enter_bug.cgi?product=NSS) (product NSS).
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