ESB-2018.2055 - [Debian] ruby2.1: Multiple vulnerabilities 2018-07-16

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2055
                          ruby2.1 security update
                               16 July 2018

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

Product:           ruby2.1
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Create Arbitrary Files          -- Remote/Unauthenticated      
                   Denial of Service               -- Remote/Unauthenticated      
                   Cross-site Scripting            -- Remote with User Interaction
                   Provide Misleading Information  -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
                   Reduced Security                -- 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-2018-8780
                   CVE-2018-8779 CVE-2018-8778 CVE-2018-8777
                   CVE-2018-6914 CVE-2017-17790 CVE-2017-17742
                   CVE-2017-17405 CVE-2017-14064 CVE-2017-14033
                   CVE-2017-10784 CVE-2017-0903 CVE-2017-0902
                   CVE-2017-0901 CVE-2017-0900 CVE-2017-0899
                   CVE-2017-0898 CVE-2016-7798 CVE-2016-2339
                   CVE-2015-9096  

Reference:         ESB-2018.1767
                   ESB-2018.1047.2
                   ASB-2017.0137
                   ESB-2017.1016

Original Bulletin: 
   https://security-tracker.debian.org/tracker/DLA-1421-1

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Package        : ruby2.1
Version        : 2.1.5-2+deb8u4
CVE ID         : CVE-2015-9096 CVE-2016-2339 CVE-2016-7798 CVE-2017-0898
                 CVE-2017-0899 CVE-2017-0900 CVE-2017-0901 CVE-2017-0902
                 CVE-2017-0903 CVE-2017-10784 CVE-2017-14033 CVE-2017-14064
                 CVE-2017-17405 CVE-2017-17742 CVE-2017-17790 CVE-2018-6914
                 CVE-2018-8777 CVE-2018-8778 CVE-2018-8779 CVE-2018-8780
                 CVE-2018-1000075 CVE-2018-1000076 CVE-2018-1000077
                 CVE-2018-1000078 CVE-2018-1000079
Debian Bug     : 851161

Multiple vulnerabilities were found in the interpreter for the Ruby
language. The Common Vulnerabilities and Exposures project identifies the
following issues:

CVE-2015-9096

    SMTP command injection in Net::SMTP via CRLF sequences in a RCPT TO
    or MAIL FROM command.

CVE-2016-2339

    Exploitable heap overflow in Fiddle::Function.new.

CVE-2016-7798

    Incorrect handling of initialization vector in the GCM mode in the
    OpenSSL extension.

CVE-2017-0898

    Buffer underrun vulnerability in Kernel.sprintf.

CVE-2017-0899

    ANSI escape sequence vulnerability in RubyGems.

CVE-2017-0900

    DoS vulnerability in the RubyGems query command.

CVE-2017-0901

    gem installer allowed a malicious gem to overwrite arbitrary files.

CVE-2017-0902

    RubyGems DNS request hijacking vulnerability.

CVE-2017-0903

    Max Justicz reported that RubyGems is prone to an unsafe object
    deserialization vulnerability. When parsed by an application which
    processes gems, a specially crafted YAML formatted gem specification
    can lead to remote code execution.

CVE-2017-10784

    Yusuke Endoh discovered an escape sequence injection vulnerability in
    the Basic authentication of WEBrick. An attacker can take advantage of
    this flaw to inject malicious escape sequences to the WEBrick log and
    potentially execute control characters on the victim's terminal
    emulator when reading logs.

CVE-2017-14033

    asac reported a buffer underrun vulnerability in the OpenSSL
    extension. A remote attacker could take advantage of this flaw to
    cause the Ruby interpreter to crash leading to a denial of service.

CVE-2017-14064

    Heap memory disclosure in the JSON library.

CVE-2017-17405

    A command injection vulnerability in Net::FTP might allow a
    malicious FTP server to execute arbitrary commands.

CVE-2017-17742

    Aaron Patterson reported that WEBrick bundled with Ruby was vulnerable
    to an HTTP response splitting vulnerability. It was possible for an
    attacker to inject fake HTTP responses if a script accepted an
    external input and output it without modifications.

CVE-2017-17790

    A command injection vulnerability in lib/resolv.rb's lazy_initialze
    might allow a command injection attack. However untrusted input to
    this function is rather unlikely.

CVE-2018-6914

    ooooooo_q discovered a directory traversal vulnerability in the
    Dir.mktmpdir method in the tmpdir library. It made it possible for
    attackers to create arbitrary directories or files via a .. (dot dot)
    in the prefix argument.

CVE-2018-8777

    Eric Wong reported an out-of-memory DoS vulnerability related to a
    large request in WEBrick bundled with Ruby.

CVE-2018-8778

    aerodudrizzt found a buffer under-read vulnerability in the Ruby
    String#unpack method. If a big number was passed with the specifier @,
    the number was treated as a negative value, and an out-of-buffer read
    occurred. Attackers could read data on heaps if an script accepts an
    external input as the argument of String#unpack.

CVE-2018-8779

    ooooooo_q reported that the UNIXServer.open and UNIXSocket.open
    methods of the socket library bundled with Ruby did not check for NUL
    bytes in the path argument. The lack of check made the methods
    vulnerable to unintentional socket creation and unintentional socket
    access.

CVE-2018-8780

    ooooooo_q discovered an unintentional directory traversal in
    some methods in Dir, by the lack of checking for NUL bytes in their
    parameter.

CVE-2018-1000075

    A negative size vulnerability in ruby gem package tar header that could
    cause an infinite loop.

CVE-2018-1000076

    RubyGems package improperly verifies cryptographic signatures. A mis-signed
    gem could be installed if the tarball contains multiple gem signatures.

CVE-2018-1000077

    An improper input validation vulnerability in RubyGems specification
    homepage attribute could allow malicious gem to set an invalid homepage
    URL.

CVE-2018-1000078

    Cross Site Scripting (XSS) vulnerability in gem server display of homepage
    attribute.

CVE-2018-1000079

    Path Traversal vulnerability during gem installation.

For Debian 8 "Jessie", these problems have been fixed in version
2.1.5-2+deb8u4.

We recommend that you upgrade your ruby2.1 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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