ESB-2018.1168 - [Win][UNIX/Linux][Ubuntu] ruby: Multiple vulnerabilities 2018-04-17

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             AUSCERT External Security Bulletin Redistribution

                           Ruby vulnerabilities
                               17 April 2018


        AusCERT Security Bulletin Summary

Product:           ruby
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
                   Unauthorised Access             -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-8780 CVE-2018-8779 CVE-2018-8778

Original Bulletin:

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running ruby check for an updated version of the software for their
         operating system.

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USN-3626-1: Ruby vulnerabilities

16 April 2018

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

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

  o Ubuntu 17.10
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS


Several security issues were fixed in Ruby.

Software Description

  o ruby2.3 - Object-oriented scripting language
  o ruby1.9.1 - Object-oriented scripting language
  o ruby2.0 - Object-oriented scripting language


It was discovered that Ruby incorrectly handled certain inputs. An attacker
could possibly use this to execute arbitrary code. (CVE-2018-6914)

It was discovered that Ruby incorrectly handled certain inputs. An attacker
could possibly use this to access sensitive information. (CVE-2018-8778,

It was discovered that Ruby incorrectly handled certain inputs. An attacker
could possibly use this to connect to an unintended socket. (CVE-2018-8779)

Update instructions

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

Ubuntu 17.10
    libruby2.3 - 2.3.3-1ubuntu1.5
    ruby2.3 - 2.3.3-1ubuntu1.5
Ubuntu 16.04 LTS
    libruby2.3 - 2.3.1-2~16.04.9
    ruby2.3 - 2.3.1-2~16.04.9
Ubuntu 14.04 LTS
    libruby1.9.1 -
    libruby2.0 -
    ruby1.9.1 -
    ruby1.9.3 -
    ruby2.0 -

To update your system, please follow these instructions: https://

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


  o CVE-2018-6914
  o CVE-2018-8778
  o CVE-2018-8779
  o CVE-2018-8780

(C) 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
Canonical Ltd.

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