ESB-2018.1258 - [Debian] ruby 1.9.1: Multiple vulnerabilities 2018-04-26

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1258
                         ruby1.9.1 security update
                               26 April 2018

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

Product:           ruby 1.9.1
Publisher:         Debian
Operating System:  Debian GNU/Linux 7
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated      
                   Create Arbitrary Files         -- Remote/Unauthenticated      
                   Denial of Service              -- Remote/Unauthenticated      
                   Cross-site Scripting           -- Remote with User Interaction
                   Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         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-2018-1000 CVE-2017-17742 

Reference:         ASB-2018.0073.2
                   ESB-2018.0204
                   ESB-2018.0157

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html

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Package        : ruby1.9.1
Version        : 1.9.3.194-8.1+deb7u8
CVE ID         : CVE-2017-17742 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

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

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-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

    Ruby gems 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 ruby gems 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

For Debian 7 "Wheezy", these problems have been fixed in version
1.9.3.194-8.1+deb7u8.

We recommend that you upgrade your ruby1.9.1 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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