Ubuntu 3685-1: Ruby vulnerabilities

    Date14 Jun 2018
    CategoryUbuntu
    7228
    Posted ByAnthony Pell
    Several security issues were fixed in Ruby.
    ==========================================================================
    Ubuntu Security Notice USN-3685-1
    June 13, 2018
    
    ruby1.9.1, ruby2.0, 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:
    - ruby2.3: Object-oriented scripting language
    - ruby1.9.1: Object-oriented scripting language
    - ruby2.0: Object-oriented scripting language
    
    Details:
    
    Some of these CVE were already addressed in previous
    USN: 3439-1, 3553-1, 3528-1. Here we address for
    the remain releases.
    
    It was discovered that Ruby incorrectly handled certain inputs.
    An attacker could use this to cause a buffer overrun. (CVE-2017-0898)
    
    It was discovered that Ruby incorrectly handled certain files.
    An attacker could use this to overwrite any file on the filesystem.
    (CVE-2017-0901)
    
    It was discovered that Ruby was vulnerable to a DNS hijacking
    vulnerability. An attacker could use this to possibly force the
    RubyGems client to download and install gems from a server that the
    attacker controls.  (CVE-2017-0902)
    
    It was discovered that Ruby incorrectly handled certain YAML files.
    An attacker could use this to possibly execute arbitrary code. 
    (CVE-2017-0903)
    
    It was discovered that Ruby incorrectly handled certain files.
    An attacker could use this to expose sensitive information.
    (CVE-2017-14064)
    
    It was discovered that Ruby incorrectly handled certain inputs.
    An attacker could use this to execute arbitrary code. (CVE-2017-10784)
    
    It was discovered that Ruby incorrectly handled certain network
    requests. An attacker could possibly use this to inject a crafted key
    into a HTTP response. (CVE-2017-17742)
    
    It was discovered that Ruby incorrectly handled certain files.
    An attacker could possibly use this to execute arbitrary code.
    This update is only addressed to ruby2.0. (CVE-2018-1000074)
    
    It was discovered that Ruby incorrectly handled certain network
    requests. An attacker could possibly use this to cause a denial of
    service. (CVE-2018-8777)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 17.10:
      libruby2.3                      2.3.3-1ubuntu1.6
      ruby2.3                         2.3.3-1ubuntu1.6
    
    Ubuntu 16.04 LTS:
      libruby2.3                      2.3.1-2~16.04.10
      ruby2.3                         2.3.1-2~16.04.10
    
    Ubuntu 14.04 LTS:
      libruby1.9.1                    1.9.3.484-2ubuntu1.12
      libruby2.0                      2.0.0.484-1ubuntu2.10
      ruby1.9.1                       1.9.3.484-2ubuntu1.12
      ruby1.9.3                       1.9.3.484-2ubuntu1.12
      ruby2.0                         2.0.0.484-1ubuntu2.10
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3685-1
      CVE-2017-0898, CVE-2017-0901, CVE-2017-0902, CVE-2017-0903,
      CVE-2017-10784, CVE-2017-14064, CVE-2017-17742, CVE-2018-1000074,
      CVE-2018-8777
    
    Package Information:
      https://launchpad.net/ubuntu/+source/ruby2.3/2.3.3-1ubuntu1.6
      https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.10
      https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.12
      https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.10
    
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