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February 2018

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Date:
Wed, 28 Feb 2018 20:59:21 -0000
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Security Errata for Scientific Linux <[log in to unmask]>
From:
Pat Riehecky <[log in to unmask]>
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text/plain (96 lines)
Synopsis:          Important: ruby security update
Advisory ID:       SLSA-2018:0378-1
Issue Date:        2018-02-28
CVE Numbers:       CVE-2017-14064
                   CVE-2017-0901
                   CVE-2017-0900
                   CVE-2017-0902
                   CVE-2017-0899
                   CVE-2017-14033
                   CVE-2017-10784
                   CVE-2017-0898
                   CVE-2017-0903
                   CVE-2017-17405
                   CVE-2017-17790
--

Security Fix(es):

* It was discovered that the Net::FTP module did not properly process
filenames in combination with certain operations. A remote attacker could
exploit this flaw to execute arbitrary commands by setting up a malicious
FTP server and tricking a user or Ruby application into downloading files
with specially crafted names using the Net::FTP module. (CVE-2017-17405)

* A buffer underflow was found in ruby's sprintf function. An attacker,
with ability to control its format string parameter, could send a
specially crafted string that would disclose heap memory or crash the
interpreter. (CVE-2017-0898)

* It was found that rubygems did not sanitize gem names during
installation of a given gem. A specially crafted gem could use this flaw
to install files outside of the regular directory. (CVE-2017-0901)

* A vulnerability was found where rubygems did not sanitize DNS responses
when requesting the hostname of the rubygems server for a domain, via a
_rubygems._tcp DNS SRV query. An attacker with the ability to manipulate
DNS responses could direct the gem command towards a different domain.
(CVE-2017-0902)

* A vulnerability was found where the rubygems module was vulnerable to an
unsafe YAML deserialization when inspecting a gem. Applications inspecting
gem files without installing them can be tricked to execute arbitrary code
in the context of the ruby interpreter. (CVE-2017-0903)

* It was found that WEBrick did not sanitize all its log messages. If logs
were printed in a terminal, an attacker could interact with the terminal
via the use of escape sequences. (CVE-2017-10784)

* It was found that the decode method of the OpenSSL::ASN1 module was
vulnerable to buffer underrun. An attacker could pass a specially crafted
string to the application in order to crash the ruby interpreter, causing
a denial of service. (CVE-2017-14033)

* A vulnerability was found where rubygems did not properly sanitize gems'
specification text. A specially crafted gem could interact with the
terminal via the use of escape sequences. (CVE-2017-0899)

* It was found that rubygems could use an excessive amount of CPU while
parsing a sufficiently long gem summary. A specially crafted gem from a
gem repository could freeze gem commands attempting to parse its summary.
(CVE-2017-0900)

* A buffer overflow vulnerability was found in the JSON extension of ruby.
An attacker with the ability to pass a specially crafted JSON input to the
extension could use this flaw to expose the interpreter's heap memory.
(CVE-2017-14064)

* The "lazy_initialize" function in lib/resolv.rb did not properly process
certain filenames. A remote attacker could possibly exploit this flaw to
inject and execute arbitrary commands. (CVE-2017-17790)
--

SL7
  x86_64
    ruby-2.0.0.648-33.el7_4.x86_64.rpm
    ruby-debuginfo-2.0.0.648-33.el7_4.i686.rpm
    ruby-debuginfo-2.0.0.648-33.el7_4.x86_64.rpm
    ruby-libs-2.0.0.648-33.el7_4.i686.rpm
    ruby-libs-2.0.0.648-33.el7_4.x86_64.rpm
    rubygem-bigdecimal-1.2.0-33.el7_4.x86_64.rpm
    rubygem-io-console-0.4.2-33.el7_4.x86_64.rpm
    rubygem-json-1.7.7-33.el7_4.x86_64.rpm
    rubygem-psych-2.0.0-33.el7_4.x86_64.rpm
    ruby-devel-2.0.0.648-33.el7_4.x86_64.rpm
    ruby-tcltk-2.0.0.648-33.el7_4.x86_64.rpm
  noarch
    ruby-irb-2.0.0.648-33.el7_4.noarch.rpm
    rubygem-rdoc-4.0.0-33.el7_4.noarch.rpm
    rubygems-2.0.14.1-33.el7_4.noarch.rpm
    ruby-doc-2.0.0.648-33.el7_4.noarch.rpm
    rubygem-minitest-4.3.2-33.el7_4.noarch.rpm
    rubygem-rake-0.9.6-33.el7_4.noarch.rpm
    rubygems-devel-2.0.14.1-33.el7_4.noarch.rpm

- Scientific Linux Development Team

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