A security flaw was found on ruby currently shiped on Fedora 18 that carefully crafted sequence of strings may cause a denial of service attack on the service that parses the sequence to create a Hash object by using the strings as keys. This issue is now registered as CVE-2012-5371.

This new package should fix this issue.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The official ruby site reports :

Carefully crafted sequence of strings can cause a denial of service attack on the service that parses the sequence to create a Hash object by using the strings as keys. For instance, this vulnerability affects web application that parses the JSON data sent from untrusted entity.

This vulnerability is similar to CVS-2011-4815 for ruby 1.8.7. ruby 1.9 versions were using modified MurmurHash function but it's reported that there is a way to create sequence of strings that collide their hash values each other. This fix changes the Hash function of String object from the MurmurHash to SipHash 2-4.

Two vulnerabilities were identified in the Ruby language interpreter, version 1.9.1.

CVE-2012-5371

Jean-Philippe Aumasson identified that Ruby computed hash values without properly restricting the ability to trigger hash collisions predictably, allowing context-dependent attackers to cause a denial of service (CPU consumption). This is a different vulnerability than CVE-2011-4815.

CVE-2013-0269

Thomas Hollstegge and Ben Murphy found that the JSON gem for Ruby allowed remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain internal objects.

For the squeeze distribution, theses vulnerabilities have been fixed in version 1.9.2.0-2+deb6u5 of ruby1.9.1. We recommend that you upgrade your ruby1.9.1 package.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ruby19 was updated to fix various bugs and security issues: Update to 1.9.3 p385 (bnc#802406)

  - XSS exploit of RDoc documentation generated by rdoc     (CVE-2013-0256)

  - for other changes see     /usr/share/doc/packages/ruby19/Changelog

Update to 1.9.3 p327 (bnc#789983)

  - CVE-2012-5371 and plenty of other fixes

Update to 1.9.3 p286 (bnc#783511, bnc#791199)

  - This release includes some security fixes, and many     other bug fixes. $SAFE escaping vulnerability about     Exception#to_s / NameError#to_s (CVE-2012-4464,     CVE-2012-4466)

  - Unintentional file creation caused by inserting an     illegal NUL character many other bug fixes.
    (CVE-2012-4522) Also following bugfixes and packaging     fixes were done :

  - make sure the rdoc output is more stable for     build-compare (new patch ruby-sort-rdoc-output.patch)

  - readd the private header *atomic.h

  - remove build depencency on ca certificates - only     causing cycles

  - one more header needed for rubygem-ruby-debug-base19

  - install vm_core.h and its dependencies as     ruby-devel-extra

  - move the provides to the ruby package instead

  - add provides for the internal gems

  - restore the old ruby macros and the gem wrapper script

  - gem_install_wrapper no longer necessary

The remote host is affected by the vulnerability described in GLSA-201412-27 (Ruby: Denial of Service)

    Multiple vulnerabilities have been discovered in Ruby. Please review the       CVE identifiers referenced below for details.
  Impact :

    A context-dependent attacker could possibly execute arbitrary code with       the privileges of the process, cause a Denial of Service condition, or       bypass security restrictions.
  Workaround :

    There is no known workaround at this time.

Jean-Philippe Aumasson discovered that Ruby incorrectly generated predictable hash values. An attacker could use this issue to generate hash collisions and cause a denial of service. (CVE-2012-5371)

Evgeny Ermakov discovered that documentation generated by rdoc is vulnerable to a cross-site scripting issue. With cross-site scripting vulnerabilities, if a user were tricked into viewing a specially crafted page, a remote attacker could exploit this to modify the contents, or steal confidential data, within the same domain.
(CVE-2013-0256)

Thomas Hollstegge and Ben Murphy discovered that the JSON implementation in Ruby incorrectly handled certain crafted documents.
An attacker could use this issue to cause a denial of service or bypass certain protection mechanisms. (CVE-2013-0269).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Red Hat OpenShift Enterprise 1.1.1 is now available.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

OpenShift Enterprise is a cloud computing Platform-as-a-Service (PaaS) solution from Red Hat, and is designed for on-premise or private cloud deployments.

Installing the updated packages and restarting the OpenShift services are the only requirements for this update. However, if you are updating your system to Red Hat Enterprise Linux 6.4 while applying OpenShift Enterprise 1.1.1 updates, it is recommended that you restart your system.

For further information about this release, refer to the OpenShift Enterprise 1.1.1 Technical Notes, available shortly from https://access.redhat.com/knowledge/docs/

This update also fixes the following security issues :

Multiple cross-site scripting (XSS) flaws were found in rubygem-actionpack. A remote attacker could use these flaws to conduct XSS attacks against users of an application using rubygem-actionpack.
(CVE-2012-3463, CVE-2012-3464, CVE-2012-3465)

It was found that certain methods did not sanitize file names before passing them to lower layer routines in Ruby. If a Ruby application created files with names based on untrusted input, it could result in the creation of files with different names than expected.
(CVE-2012-4522)

A denial of service flaw was found in the implementation of associative arrays (hashes) in Ruby. An attacker able to supply a large number of inputs to a Ruby application (such as HTTP POST request parameters sent to a web application) that are used as keys when inserting data into an array could trigger multiple hash function collisions, making array operations take an excessive amount of CPU time. To mitigate this issue, a new, more collision resistant algorithm has been used to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-5371)

Input validation vulnerabilities were discovered in rubygem-activerecord. A remote attacker could possibly use these flaws to perform a SQL injection attack against an application using rubygem-activerecord. (CVE-2012-2661, CVE-2012-2695, CVE-2013-0155)

Input validation vulnerabilities were discovered in rubygem-actionpack. A remote attacker could possibly use these flaws to perform a SQL injection attack against an application using rubygem-actionpack and rubygem-activerecord. (CVE-2012-2660, CVE-2012-2694)

A flaw was found in the HTTP digest authentication implementation in rubygem-actionpack. A remote attacker could use this flaw to cause a denial of service of an application using rubygem-actionpack and digest authentication. (CVE-2012-3424)

A flaw was found in the handling of strings in Ruby safe level 4. A remote attacker can use Exception#to_s to destructively modify an untainted string so that it is tainted, the string can then be arbitrarily modified. (CVE-2012-4466)

A flaw was found in the method for translating an exception message into a string in the Ruby Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. (CVE-2012-4464)

It was found that ruby_parser from rubygem-ruby_parser created a temporary file in an insecure way. A local attacker could use this flaw to perform a symbolic link attack, overwriting arbitrary files accessible to the application using ruby_parser. (CVE-2013-0162)

The CVE-2013-0162 issue was discovered by Michael Scherer of the Red Hat Regional IT team.

Users are advised to upgrade to Red Hat OpenShift Enterprise 1.1.1.

New ruby packages are available for Slackware 13.1, 13.37, 14.0, and
-current to fix security issues.

According to the versions of the ruby packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - Ruby 1.8.7 before patchlevel 371, 1.9.3 before     patchlevel 286, and 2.0 before revision r37068 allows     context-dependent attackers to bypass safe-level     restrictions and modify untainted strings via the     name_err_mesg_to_str API function, which marks the     string as tainted, a different vulnerability than     CVE-2011-1005.(CVE-2012-4466)

  - The REXML parser in Ruby 1.9.x before 1.9.3 patchlevel     551, 2.0.x before 2.0.0 patchlevel 598, and 2.1.x     before 2.1.5 allows remote attackers to cause a denial     of service (CPU and memory consumption) a crafted XML     document containing an empty string in an entity that     is used in a large number of nested entity references,     aka an XML Entity Expansion (XEE) attack. NOTE: this     vulnerability exists because of an incomplete fix for     CVE-2013-1821 and CVE-2014-8080.(CVE-2014-8090)

  - Algorithmic complexity vulnerability in     Gem::Version::VERSION_PATTERN in     lib/rubygems/version.rb in RubyGems before 1.8.23.1,     1.8.24 through 1.8.25, 2.0.x before 2.0.8, and 2.1.x     before 2.1.0, as used in Ruby 1.9.0 through 2.0.0p247,     allows remote attackers to cause a denial of service     (CPU consumption) via a crafted gem version that     triggers a large amount of backtracking in a regular     expression.(CVE-2013-4287)

  - The REXML parser in Ruby 1.9.x before 1.9.3-p550, 2.0.x     before 2.0.0-p594, and 2.1.x before 2.1.4 allows remote     attackers to cause a denial of service (memory     consumption) via a crafted XML document, aka an XML     Entity Expansion (XEE) attack.(CVE-2014-8080)

  - The OpenSSL::SSL.verify_certificate_identity function     in lib/openssl/ssl.rb in Ruby 1.8 before 1.8.7-p374,     1.9 before 1.9.3-p448, and 2.0 before 2.0.0-p247 does     not properly handle a '\\0' character in a domain name     in the Subject Alternative Name field of an X.509     certificate, which allows man-in-the-middle attackers     to spoof arbitrary SSL servers via a crafted     certificate issued by a legitimate Certification     Authority, a related issue to     CVE-2009-2408.(CVE-2013-4073)

  - The rb_get_path_check function in file.c in Ruby 1.9.3     before patchlevel 286 and Ruby 2.0.0 before r37163     allows context-dependent attackers to create files in     unexpected locations or with unexpected names via a NUL     byte in a file path.(CVE-2012-4522)

  - (1) DL and (2) Fiddle in Ruby 1.9 before 1.9.3     patchlevel 426, and 2.0 before 2.0.0 patchlevel 195, do     not perform taint checking for native functions, which     allows context-dependent attackers to bypass intended     $SAFE level restrictions.(CVE-2013-2065)

  - Algorithmic complexity vulnerability in     Gem::Version::ANCHORED_VERSION_PATTERN in     lib/rubygems/version.rb in RubyGems before 1.8.23.2,     1.8.24 through 1.8.26, 2.0.x before 2.0.10, and 2.1.x     before 2.1.5, as used in Ruby 1.9.0 through 2.0.0p247,     allows remote attackers to cause a denial of service     (CPU consumption) via a crafted gem version that     triggers a large amount of backtracking in a regular     expression. NOTE: this issue is due to an incomplete     fix for CVE-2013-4287.(CVE-2013-4363)

  - Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before     r37575 computes hash values without properly     restricting the ability to trigger hash collisions     predictably, which allows context-dependent attackers     to cause a denial of service (CPU consumption) via     crafted input to an application that maintains a hash     table, as demonstrated by a universal multicollision     attack against a variant of the MurmurHash2 algorithm,     a different vulnerability than     CVE-2011-4815.(CVE-2012-5371)

  - Off-by-one error in the encodes function in pack.c in     Ruby 1.9.3 and earlier, and 2.x through 2.1.2, when     using certain format string specifiers, allows     context-dependent attackers to cause a denial of     service (segmentation fault) via vectors that trigger a     stack-based buffer overflow.(CVE-2014-4975)

  - Heap-based buffer overflow in Ruby 1.8, 1.9 before     1.9.3-p484, 2.0 before 2.0.0-p353, 2.1 before 2.1.0     preview2, and trunk before revision 43780 allows     context-dependent attackers to cause a denial of     service (segmentation fault) and possibly execute     arbitrary code via a string that is converted to a     floating point value, as demonstrated using (1) the     to_f method or (2) JSON.parse.(CVE-2013-4164)

  - It was found that the methods from the Dir class did     not properly handle strings containing the NULL byte.
    An attacker, able to inject NULL bytes in a path, could     possibly trigger an unspecified behavior of the ruby     script.(CVE-2018-8780)

  - Ruby 1.9.3 before patchlevel 286 and 2.0 before     revision r37068 allows context-dependent attackers to     bypass safe-level restrictions and modify untainted     strings via the (1) exc_to_s or (2) name_err_to_s API     function, which marks the string as tainted, a     different vulnerability than CVE-2012-4466. NOTE: this     issue might exist because of a CVE-2011-1005     regression.(CVE-2012-4464)

  - An issue was discovered in the OpenSSL library in Ruby     before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2,     and 2.6.x before 2.6.0-preview3. When two     OpenSSL::X509::Name objects are compared using ==,     depending on the ordering, non-equal objects may return     true. When the first argument is one character longer     than the second, or the second argument contains a     character that is one less than a character in the same     position of the first argument, the result of == will     be true. This could be leveraged to create an     illegitimate certificate that may be accepted as     legitimate and then used in signing or encryption     operations.(CVE-2018-16395)

  - An issue was discovered in Ruby before 2.3.8, 2.4.x     before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before     2.6.0-preview3. It does not taint strings that result     from unpacking tainted strings with some     formats.(CVE-2018-16396)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
62955	Fedora 17 : ruby-1.9.3.327-19.fc17 (2012-18017)	Nessus	Fedora Local Security Checks	11/19/2012	1/11/2021	medium
62886	FreeBSD : ruby -- Hash-flooding DoS vulnerability for ruby 1.9 (5e647ca3-2aea-11e2-b745-001fd0af1a4c)	Nessus	FreeBSD Local Security Checks	11/12/2012	1/6/2021	medium
84494	Debian DLA-263-1 : ruby1.9.1 security update	Nessus	Debian Local Security Checks	7/2/2015	1/11/2021	high
63030	Fedora 18 : ruby-1.9.3.327-22.fc18 (2012-17949)	Nessus	Fedora Local Security Checks	11/26/2012	1/11/2021	medium
74909	openSUSE Security Update : ruby19 (openSUSE-SU-2013:0376-1)	Nessus	SuSE Local Security Checks	6/13/2014	1/19/2021	medium
79980	GLSA-201412-27 : Ruby: Denial of Service	Nessus	Gentoo Local Security Checks	12/15/2014	1/6/2021	high
64799	Ubuntu 12.04 LTS / 12.10 : ruby1.9.1 vulnerabilities (USN-1733-1)	Nessus	Ubuntu Local Security Checks	2/22/2013	9/19/2019	high
119432	RHEL 6 : openshift (RHSA-2013:0582)	Nessus	Red Hat Local Security Checks	12/6/2018	7/17/2024	high
63170	Slackware 13.1 / 13.37 / 14.0 / current : ruby (SSA:2012-341-04)	Nessus	Slackware Local Security Checks	12/7/2012	1/14/2021	medium
124931	EulerOS Virtualization 3.0.1.0 : ruby (EulerOS-SA-2019-1428)	Nessus	Huawei Local Security Checks	5/14/2019	5/23/2024	critical

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