ESB-2018.1047.2 - UPDATE [Ubuntu] ruby: Multiple vulnerabilities 2018-04-16

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.1047.2
                           Ruby vulnerabilities
                               16 April 2018

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

Product:           ruby
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Modify Arbitrary Files          -- Remote with User Interaction
                   Cross-site Scripting            -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Provide Misleading Information  -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1000079 CVE-2018-1000078 CVE-2018-1000077
                   CVE-2018-1000076 CVE-2018-1000075 CVE-2018-1000074
                   CVE-2018-1000073  

Reference:         ESB-2018.0957

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3621-1
   http://www.ubuntu.com/usn/usn-3621-2

Revision History:  April 16 2018: USN-3621-1 caused a regression in Ruby
                   April  6 2018: Initial Release

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USN-3621-2: Ruby regression

13 April 2018

ruby1.9.1, ruby2.0 regression

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

  o Ubuntu 14.04 LTS

Summary

USN-3621-1 caused a regression in Ruby.

Software Description

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

Details

USN-3621-1 fixed vulnerabilities in Ruby. The update caused an issue due to an
incomplete patch for CVE-2018-1000074. This update reverts the problematic
patch pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Ruby incorrectly handled certain inputs. An attacker
could possibly use this to access sensitive information. (CVE-2018-1000073)

It was discovered that Ruby incorrectly handled certain files. An attacker
could possibly use this to execute arbitrary code. (CVE-2018-1000074)

It was discovered that Ruby incorrectly handled certain files. An attacker
could possibly use this to cause a denial of service. (CVE-2018-1000075)

It was discovered that Ruby incorrectly handled certain crypto signatures. An
attacker could possibly use this to execute arbitrary code. (CVE-2018-1000076)

It was discovered that Ruby incorrectly handled certain inputs. An attacker
could possibly use this to execute arbitrary code. (CVE-2018-1000077,
CVE-2018-1000078, CVE-2018-1000079)

Update instructions

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

Ubuntu 14.04 LTS
    libruby1.9.1 - 1.9.3.484-2ubuntu1.10
    libruby2.0 - 2.0.0.484-1ubuntu2.8
    ruby1.9.1 - 1.9.3.484-2ubuntu1.10
    ruby1.9.3 - 1.9.3.484-2ubuntu1.10
    ruby2.0 - 2.0.0.484-1ubuntu2.8

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

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

References:
  o https://usn.ubuntu.com/usn/usn-3621-2
  o https://usn.ubuntu.com/usn/usn-3621-1
  o CVE-2018-1000074

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

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