Update to the Ruby 2.4.2.

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

Multiple vulnerabilities were discovered in the Ruby 1.9 interpretor.

CVE-2017-0898

Buffer underrun vulnerability in Kernel.sprintf

CVE-2017-0899

ANSI escape sequence vulnerability

CVE-2017-0900

DOS vulernerability in the query command

CVE-2017-0901

gem installer allows a malicious gem to overwrite arbitrary files

CVE-2017-10784

Escape sequence injection vulnerability in the Basic authentication of WEBrick

CVE-2017-14033

Buffer underrun vulnerability in OpenSSL ASN1 decode

CVE-2017-14064

Heap exposure vulnerability in generating JSON

For Debian 7 'Wheezy', these problems have been fixed in version 1.9.3.194-8.1+deb7u6.

We recommend that you upgrade your ruby1.9.1 packages.

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.

The remote host is affected by the vulnerability described in GLSA-201710-18 (Ruby: Multiple vulnerabilities)

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

    A remote attacker could execute arbitrary code, cause a Denial of       Service condition, or obtain sensitive information.
  Workaround :

    There is no known workaround at this time.

The remote host is running Mac OS X 10.11.6 or Mac OS X 10.12.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities.

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

  - The lazy_initialize function in lib/resolv.rb in Ruby     through 2.4.3 uses Kernel#open, which might allow     Command Injection attacks, as demonstrated by a     Resolv::Hosts::new argument beginning with a '|'     character, a different vulnerability than     CVE-2017-17405. NOTE: situations with untrusted input     may be highly unlikely.(CVE-2017-17790)

  - 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)

  - 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)

  - 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)

  - 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 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)

  - 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)

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.

According to the versions of the ruby packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - 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)

  - 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)

  - 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)

  - 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 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)

  - 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 inter preter's heap     memory.(CVE-2017-14064)

  - 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 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)

  - 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)

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.

The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:0585 advisory.

    Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text     files and to perform system management tasks.

    The following packages have been upgraded to a later upstream version: rh-ruby23-ruby (2.3.6), rh-     ruby23-rubygems (2.5.2.2), rh-ruby23-rubygem-json (1.8.3.1), rh-ruby23-rubygem-minitest (5.8.5), rh-     ruby23-rubygem-psych (2.1.0.1). (BZ#1549649)

    Security Fix(es):

    * ruby: Command injection vulnerability in Net::FTP (CVE-2017-17405)

    * ruby: Buffer underrun vulnerability in Kernel.sprintf (CVE-2017-0898)

    * rubygems: Arbitrary file overwrite due to incorrect validation of specification name (CVE-2017-0901)

    * rubygems: DNS hijacking vulnerability (CVE-2017-0902)

    * rubygems: Unsafe object deserialization through YAML formatted gem specifications (CVE-2017-0903)

    * ruby: Escape sequence injection vulnerability in the Basic authentication of WEBrick (CVE-2017-10784)

    * ruby: Buffer underrun in OpenSSL ASN1 decode (CVE-2017-14033)

    * rubygems: Escape sequence in the summary field of gemspec (CVE-2017-0899)

    * rubygems: No size limit in summary length of gem spec (CVE-2017-0900)

    * ruby: Arbitrary heap exposure during a JSON.generate call (CVE-2017-14064)

    * ruby: Command injection in lib/resolv.rb:lazy_initialize() allows arbitrary code execution     (CVE-2017-17790)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
105862	Fedora 27 : ruby (2017-4166994614)	Nessus	Fedora Local Security Checks	1/15/2018	11/6/2025	critical
103472	Debian DLA-1114-1 : ruby1.9.1 security update	Nessus	Debian Local Security Checks	9/27/2017	11/20/2025	critical
103911	GLSA-201710-18 : Ruby: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	10/18/2017	11/18/2025	critical
111136	macOS and Mac OS X Multiple Vulnerabilities (Security Update 2018-004)	Nessus	MacOS X Local Security Checks	7/17/2018	9/4/2024	critical
117557	EulerOS Virtualization 2.5.0 : ruby (EulerOS-SA-2018-1248)	Nessus	Huawei Local Security Checks	9/18/2018	8/7/2024	critical
124910	EulerOS Virtualization for ARM 64 3.0.1.0 : ruby (EulerOS-SA-2019-1407)	Nessus	Huawei Local Security Checks	5/14/2019	5/20/2022	critical
194120	RHEL 6 / 7 : rh-ruby23-ruby (RHSA-2018:0585)	Nessus	Red Hat Local Security Checks	4/27/2024	11/5/2024	critical

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