Siamo lieti di annunciare il rilascio di Ruby 2.4.2.
Questa release include alcuni fix di sicurezza.

* [CVE-2017-0898: Buffer underrun vulnerability in Kernel.sprintf](/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/)
* [CVE-2017-10784: Escape sequence injection vulnerability in the Basic authentication of WEBrick](/en/news/2017/09/14/webrick-basic-auth-escape-sequence-injection-cve-2017-10784/)
* [CVE-2017-14033: Buffer underrun vulnerability in OpenSSL ASN1 decode](/en/news/2017/09/14/openssl-asn1-buffer-underrun-cve-2017-14033/)
* [CVE-2017-14064: Heap exposure in generating JSON](/en/news/2017/09/14/json-heap-exposure-cve-2017-14064/)
* [Multiple vulnerabilities in RubyGems](/en/news/2017/08/29/multiple-vulnerabilities-in-rubygems/)
* Update bundled libyaml to version 0.1.7.

Ci sono anche molti fix di bug.
Si vedano i [commit logs](https://github.com/ruby/ruby/compare/v2_4_1...v2_4_2) per ulteriori dettagli.

## Problemi conosciuti

_(This section was added at September 15, 2017.)_
_(Questa sezione è stata aggiunta il 15 settembre 2017.)_

E' stata trovata una incompatibilità in Ruby 2.4.2.
Ruby 2.4.2 non può linkare le librerie libgmp e jemalloc.
Risolveremo questo problema con la prossima release, me se lo riscontrate ora e avete la necessità di una soluzione immediata, potete prelevare una patch da questo link:

* [Ruby 2.4.2 and 2.3.5 cannot link with libgmp nor jemalloc](https://bugs.ruby-lang.org/issues/13899)

## Download

* <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.tar.bz2>

      SIZE:   12607283 bytes
      SHA1:   a8a50a9297ff656e5230bf0f945acd69cc02a097
      SHA256: 08e72d0cbe870ed1317493600fbbad5995ea3af2d0166585e7ecc85d04cc50dc
      SHA512: 1a5302d2558089a6b91b815fff9b75a29e690f10861de5fdd48211f3f45025a70dad7495f216e6af9c62d72e69ed316f1a52fada704bdc7e6d8c094d141ea77c

* <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.tar.gz>

      SIZE:   14187859 bytes
      SHA1:   b096124469e31e4fc3d00d2b61b11d36992e6bbd
      SHA256: 93b9e75e00b262bc4def6b26b7ae8717efc252c47154abb7392e54357e6c8c9c
      SHA512: 96c236bdcd09b2e7cf429da631a487fc00f1255443751c03c8abeb4c2ce57079ad60ef566fecc0bf2c7beb2f080e2b8c4d30f321664547b2dc7d2a62aa1075ef

* <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.tar.xz>

      SIZE:   10046412 bytes
      SHA1:   8373e32c63bba2180799da091b572664aa9faf6f
      SHA256: 748a8980d30141bd1a4124e11745bb105b436fb1890826e0d2b9ea31af27f735
      SHA512: c1d42272fb0d94b693452e703b0ea4942bf59cbd4b08ba83bf039f54be97ebc88511632413da0164970b4cf97bc302bccb88aab48edfa8fa147498e7ee741595

* <https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.zip>

      SIZE:   15645325 bytes
      SHA1:   861b51de9db0d822ef141ad04383c76aa3cd2fff
      SHA256: 37d7cb27d8abd4b143556260506306659930548652343076f7f8470f07818824
      SHA512: 234765091528be1310ac315868f84ae6c505aa696672929df2f00828c1bbdc7cbcb2fc690eab4e73efde6be9104584ba7b6944853861f6d05e775b124ce8dfd5

## Release Comment
I molti committers, sviluppatori e utenti che hanno fornito segnalazioni di bug ci hanno aiutato
a realizzare questo rilascio.
Un ringraziamento per il loro contributo.