ESB-2019.1252 - [Ubuntu] ruby: Multiple vulnerabilities 2019-04-12

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1252
                           Ruby vulnerabilities
                               12 April 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           ruby
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Delete Arbitrary Files          -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-8325 CVE-2019-8324 CVE-2019-8323
                   CVE-2019-8322 CVE-2019-8321 CVE-2019-8320

Reference:         ESB-2019.1072
                   ESB-2019.0821
                   ESB-2019.0678

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3945-1

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==========================================================================
Ubuntu Security Notice USN-3945-1
April 11, 2019

ruby1.9.1, ruby2.0, ruby2.3, ruby2.5 vulnerabilities
==========================================================================

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

- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Ruby.

Software Description:
- - ruby2.5: Interpreter of object-oriented scripting language Ruby
- - ruby2.3: Object-oriented scripting language
- - ruby1.9.1: Object-oriented scripting language
- - ruby2.0: Object-oriented scripting language

Details:

It was discovered that Ruby incorrectly handled certain RubyGems.
An attacker could possibly use this issue to execute arbitrary
commands. (CVE-2019-8320)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2019-8321, CVE-2019-8322, CVE-2019-8323, CVE-2019-8324, CVE-2019-8325)

Update instructions:

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

Ubuntu 18.10:
   libruby2.5                                            2.5.1-5ubuntu4.3
   ruby2.5                                                  2.5.1-5ubuntu4.3

Ubuntu 18.04 LTS:
   libruby2.5                                            2.5.1-1ubuntu1.2
   ruby2.5                                                  2.5.1-1ubuntu1.2

Ubuntu 16.04 LTS:
   libruby2.3                                            2.3.1-2~16.04.12
   ruby2.3                                                  2.3.1-2~16.04.12

Ubuntu 14.04 LTS:
   libruby1.9.1                                        1.9.3.484-2ubuntu1.14
   libruby2.0                                            2.0.0.484-1ubuntu2.13
   ruby1.9.1                                              1.9.3.484-2ubuntu1.14
   ruby1.9.3                                              1.9.3.484-2ubuntu1.14
   ruby2.0                                                  2.0.0.484-1ubuntu2.13

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

References:
   https://usn.ubuntu.com/usn/usn-3945-1
   CVE-2019-8320, CVE-2019-8321, CVE-2019-8322, CVE-2019-8323,
   CVE-2019-8324, CVE-2019-8325

Package Information:
   https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-5ubuntu4.3
   https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.2
   https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.12
   https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.14
   https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.13

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