ESB-2018.0122 - [Ubuntu] ruby: Multiple vulnerabilities 2018-01-11

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

                               ESB-2018.0122
                           Ruby vulnerabilities
                              11 January 2018

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

Product:           ruby
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17790 CVE-2017-14064 CVE-2017-14033
                   CVE-2017-10784  

Reference:         ESB-2017.3238
                   ESB-2017.2520
                   ESB-2017.2224

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3528-1

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USN-3528-1: Ruby vulnerabilities

Ubuntu Security Notice USN-3528-1

10th January, 2018
ruby1.9.1, ruby2.3 vulnerabilities

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

    Ubuntu 17.10
    Ubuntu 16.04 LTS
    Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Ruby.

Software description

    ruby1.9.1 - Interpreter of object-oriented scripting language Ruby
    ruby2.3 - Interpreter of object-oriented scripting language Ruby

Details

It was discovered that Ruby incorrectly handled certain terminal emulator
escape sequences. An attacker could use this to execute arbitrary code via
a crafted user name. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-10784)

It was discovered that Ruby incorrectly handled certain strings.
An attacker could use this to cause a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-14033)

It was discovered that Ruby incorrectly handled some generating JSON.
An attacker could use this to possible expose sensitive information.
This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-14064)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to execute arbitrary code.
(CVE-2017-17790)

Update instructions

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

Ubuntu 17.10:
    libruby2.3 2.3.3-1ubuntu1.2 
    ruby2.3 2.3.3-1ubuntu1.2 
Ubuntu 16.04 LTS:
    libruby2.3 2.3.1-2~16.04.5 
    ruby2.3 2.3.1-2~16.04.5 
Ubuntu 14.04 LTS:
    ruby1.9.1 1.9.3.484-2ubuntu1.7 
    ruby1.9.3 1.9.3.484-2ubuntu1.7 
    libruby1.9.1 1.9.3.484-2ubuntu1.7 

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

CVE-2017-10784, CVE-2017-14033, CVE-2017-14064, CVE-2017-17790

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