An exploitable heap overflow vulnerability exists in the Fiddle::Function.new "initialize" function functionality of Ruby. In Fiddle::Function.new "initialize" heap buffer "arg_types" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - ruby: Fiddle::Function.new heap buffer overflow (CVE-2016-2339)

  - DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens     libraries with tainted names. (CVE-2009-5147)

  - verify_certificate_identity in the OpenSSL extension in Ruby before 2.0.0 patchlevel 645, 2.1.x before     2.1.6, and 2.2.x before 2.2.2 does not properly validate hostnames, which allows remote attackers to spoof     servers via vectors related to (1) multiple wildcards, (1) wildcards in IDNA names, (3) case sensitivity,     and (4) non-ASCII characters. (CVE-2015-1855)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This update for ruby2.1 fixes the following issues :

Security issues fixed :

CVE-2015-9096: Fixed an SMTP command injection via CRLFsequences in a RCPT TO or MAIL FROM command (bsc#1043983).

CVE-2016-7798: Fixed an IV Reuse in GCM Mode (bsc#1055265).

CVE-2017-0898: Fixed a buffer underrun vulnerability in Kernel.sprintf (bsc#1058755).

CVE-2017-0899: Fixed an issue with malicious gem specifications, insufficient sanitation when printing gem specifications could have included terminal characters (bsc#1056286).

CVE-2017-0900: Fixed an issue with malicious gem specifications, the query command could have led to a denial of service attack against clients (bsc#1056286).

CVE-2017-0901: Fixed an issue with malicious gem specifications, potentially overwriting arbitrary files on the client system (bsc#1056286).

CVE-2017-0902: Fixed an issue with malicious gem specifications, that could have enabled MITM attacks against clients (bsc#1056286).

CVE-2017-0903: Fixed an unsafe object deserialization vulnerability (bsc#1062452).

CVE-2017-9228: Fixed a heap out-of-bounds write in bitset_set_range() during regex compilation (bsc#1069607).

CVE-2017-9229: Fixed an invalid pointer dereference in left_adjust_char_head() in oniguruma (bsc#1069632).

CVE-2017-10784: Fixed an escape sequence injection vulnerability in the Basic authentication of WEBrick (bsc#1058754).

CVE-2017-14033: Fixed a buffer underrun vulnerability in OpenSSL ASN1 decode (bsc#1058757).

CVE-2017-14064: Fixed an arbitrary memory exposure during a JSON.generate call (bsc#1056782).

CVE-2017-17405: Fixed a command injection vulnerability in Net::FTP (bsc#1073002).

CVE-2017-17742: Fixed an HTTP response splitting issue in WEBrick (bsc#1087434).

CVE-2017-17790: Fixed a command injection in lib/resolv.rb:lazy_initialize() (bsc#1078782).

CVE-2018-6914: Fixed an unintentional file and directory creation with directory traversal in tempfile and tmpdir (bsc#1087441).

CVE-2018-8777: Fixed a potential DoS caused by large requests in WEBrick (bsc#1087436).

CVE-2018-8778: Fixed a buffer under-read in String#unpack (bsc#1087433).

CVE-2018-8779: Fixed an unintentional socket creation by poisoned NUL byte in UNIXServer and UNIXSocket (bsc#1087440).

CVE-2018-8780: Fixed an unintentional directory traversal by poisoned NUL byte in Dir (bsc#1087437).

CVE-2018-16395: Fixed an issue with OpenSSL::X509::Name equality checking (bsc#1112530).

CVE-2018-16396: Fixed an issue with tainted string handling, where the flag was not propagated in Array#pack and String#unpack with some directives (bsc#1112532).

CVE-2018-1000073: Fixed a path traversal issue (bsc#1082007).

CVE-2018-1000074: Fixed an unsafe object deserialization vulnerability in gem owner, allowing arbitrary code execution with specially crafted YAML (bsc#1082008).

CVE-2018-1000075: Fixed an infinite loop vulnerability due to negative size in tar header causes Denial of Service (bsc#1082014).

CVE-2018-1000076: Fixed an improper verification of signatures in tarballs (bsc#1082009).

CVE-2018-1000077: Fixed an improper URL validation in the homepage attribute of ruby gems (bsc#1082010).

CVE-2018-1000078: Fixed a XSS vulnerability in the homepage attribute when displayed via gem server (bsc#1082011).

CVE-2018-1000079: Fixed a path traversal issue during gem installation allows to write to arbitrary filesystem locations (bsc#1082058).

CVE-2019-8320: Fixed a directory traversal issue when decompressing tar files (bsc#1130627).

CVE-2019-8321: Fixed an escape sequence injection vulnerability in verbose (bsc#1130623).

CVE-2019-8322: Fixed an escape sequence injection vulnerability in gem owner (bsc#1130622).

CVE-2019-8323: Fixed an escape sequence injection vulnerability in API response handling (bsc#1130620).

CVE-2019-8324: Fixed an issue with malicious gems that may have led to arbitrary code execution (bsc#1130617).

CVE-2019-8325: Fixed an escape sequence injection vulnerability in errors (bsc#1130611).

CVE-2019-15845: Fixed a NUL injection vulnerability in File.fnmatch and File.fnmatch? (bsc#1152994).

CVE-2019-16201: Fixed a regular expression denial of service vulnerability in WEBrick's digest access authentication (bsc#1152995).

CVE-2019-16254: Fixed an HTTP response splitting vulnerability in WEBrick (bsc#1152992).

CVE-2019-16255: Fixed a code injection vulnerability in Shell#[] and Shell#test (bsc#1152990).

CVE-2020-10663: Fixed an unsafe object creation vulnerability in JSON (bsc#1171517).

Non-security issue fixed :

Add conflicts to libruby to make sure ruby and ruby-stdlib are also updated when libruby is updated (bsc#1048072).

Also yast2-ruby-bindings on SLES 12 SP2 LTSS was updated to handle the updated ruby interpreter. (bsc#1172275)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 :

  - Ruby is an extensible, interpreted, object-oriented,     scripting language. It has features to process text     files and to perform system management tasks.Security     Fix(es):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)** RESERVED
    ** This candidate has been reserved by an organization     or individual that will use it when announcing a new     security problem. When the candidate has been     publicized, the details for this candidate will be     provided.(CVE-2019-8322)** RESERVED ** This candidate     has been reserved by an organization or individual that     will use it when announcing a new security problem.
    When the candidate has been publicized, the details for     this candidate will be provided.(CVE-2019-8323)**     RESERVED ** This candidate has been reserved by an     organization or individual that will use it when     announcing a new security problem. When the candidate     has been publicized, the details for this candidate     will be provided.(CVE-2019-8324)** RESERVED ** This     candidate has been reserved by an organization or     individual that will use it when announcing a new     security problem. When the candidate has been     publicized, the details for this candidate will be     provided.(CVE-2019-8325)An exploitable heap overflow     vulnerability exists in the Fiddle::Function.new     ''initialize'' function functionality of Ruby. In     Fiddle::Function.new ''initialize'' heap buffer     ''arg_types'' allocation is made based on args array     length. Specially constructed object passed as element     of args array can increase this array size after     mentioned allocation and cause heap     overflow.(CVE-2016-2339)Type confusion exists in
    _cancel_eval Ruby's TclTkIp class method. Attacker     passing different type of object than String as     ''retval'' argument can cause arbitrary code     execution.(CVE-2016-2337)

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.

An update of the ruby package has been released.

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.

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 Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3365-1 advisory.

    It was discovered that Ruby DL::dlopen incorrectly handled opening libraries. An attacker could possibly     use this issue to open libraries with tainted names. This issue only applied to Ubuntu 14.04 LTS.
    (CVE-2009-5147)

    Tony Arcieri, Jeffrey Walton, and Steffan Ullrich discovered that the Ruby OpenSSL extension incorrectly     handled hostname wildcard matching. This issue only applied to Ubuntu 14.04 LTS. (CVE-2015-1855)

    Christian Hofstaedtler discovered that Ruby Fiddle::Handle incorrectly handled certain crafted strings. An     attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. This issue     only applied to Ubuntu 14.04 LTS. (CVE-2015-7551)

    It was discovered that Ruby Net::SMTP incorrectly handled CRLF sequences. A remote attacker could possibly     use this issue to inject SMTP commands. (CVE-2015-9096)

    Marcin Noga discovered that Ruby incorrectly handled certain arguments in a TclTkIp class method. An     attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04     LTS. (CVE-2016-2337)

    It was discovered that Ruby Fiddle::Function.new incorrectly handled certain arguments. An attacker could     possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2016-2339)

    It was discovered that Ruby incorrectly handled the initialization vector (IV) in GCM mode. An attacker     could possibly use this issue to bypass encryption. (CVE-2016-7798)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

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

  - An exploitable heap overflow vulnerability exists in     the Fiddle::Function.new 'initialize' function     functionality of Ruby. In Fiddle::Function.new     'initialize' heap buffer 'arg_types' allocation is made     based on args array length. Specially constructed     object passed as element of args array can increase     this array size after mentioned allocation and cause     heap overflow.(CVE-2016-2339)

  - Type confusion exists in _cancel_eval Ruby's TclTkIp     class method. Attacker passing different type of object     than String as 'retval' argument can cause arbitrary     code execution.(CVE-2016-2337)

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.

This ruby2.1 update to version 2.1.9 fixes the following issues :

Security issues fixed :

  - CVE-2016-2339: heap overflow vulnerability in the     Fiddle::Function.new'initialize' (bsc#1018808)

  - CVE-2015-7551: Unsafe tainted string usage in Fiddle and     DL (bsc#959495)

  - CVE-2015-3900: hostname validation does not work when     fetching gems or making API requests (bsc#936032)

  - CVE-2015-1855: Ruby'a OpenSSL extension suffers a     vulnerability through overly permissive matching of     hostnames (bsc#926974)

  - CVE-2014-4975: off-by-one stack-based buffer overflow in     the encodes() function (bsc#887877)

Bugfixes :

  - SUSEconnect doesn't handle domain wildcards in no_proxy     environment variable properly (bsc#1014863)

  - Segmentation fault after pack & ioctl & unpack     (bsc#909695)

  - Ruby:HTTP Header injection in 'net/http' (bsc#986630)

ChangeLog :

- http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog

This update was imported from the SUSE:SLE-12:Update update project.

This ruby2.1 update to version 2.1.9 fixes the following issues:
Security issues fixed :

  - CVE-2016-2339: heap overflow vulnerability in the     Fiddle::Function.new'initialize' (bsc#1018808)

  - CVE-2015-7551: Unsafe tainted string usage in Fiddle and     DL (bsc#959495)

  - CVE-2015-3900: hostname validation does not work when     fetching gems or making API requests (bsc#936032)

  - CVE-2015-1855: Ruby'a OpenSSL extension suffers a     vulnerability through overly permissive matching of     hostnames (bsc#926974)

  - CVE-2014-4975: off-by-one stack-based buffer overflow in     the encodes() function (bsc#887877) Bugfixes :

  - SUSEconnect doesn't handle domain wildcards in no_proxy     environment variable properly (bsc#1014863)

  - Segmentation fault after pack & ioctl & unpack     (bsc#909695)

  - Ruby:HTTP Header injection in 'net/http' (bsc#986630)     ChangeLog :

- http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog

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

This update for ruby2.2, ruby2.3 fixes the following issues :

Security issues fixed :

  - CVE-2016-2339: heap overflow vulnerability in the     Fiddle::Function.new'initialize' (boo#1018808)

  - CVE-2015-7551: Unsafe tainted string usage in Fiddle and     DL (boo#959495)

Detailed ChangeLog :

- http://svn.ruby-lang.org/repos/ruby/tags/v2_2_6/ChangeLog

- http://svn.ruby-lang.org/repos/ruby/tags/v2_3_3/ChangeLog

ID	Name	Product	Family	Severity
198343	RHEL 7 : ruby (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
137599	SUSE SLES12 Security Update : ruby2.1 (SUSE-SU-2020:1570-1)	Nessus	SuSE Local Security Checks	critical
125569	EulerOS Virtualization for ARM 64 3.0.2.0 : ruby (EulerOS-SA-2019-1617)	Nessus	Huawei Local Security Checks	critical
121666	Photon OS 1.0: Ruby PHSA-2017-0002	Nessus	PhotonOS Local Security Checks	critical
111081	Debian DLA-1421-1 : ruby2.1 security update	Nessus	Debian Local Security Checks	critical
101974	Ubuntu 14.04 LTS / 16.04 LTS : Ruby vulnerabilities (USN-3365-1)	Nessus	Ubuntu Local Security Checks	critical
99896	EulerOS 2.0 SP2 : ruby (EulerOS-SA-2017-1051)	Nessus	Huawei Local Security Checks	critical
99895	EulerOS 2.0 SP1 : ruby (EulerOS-SA-2017-1050)	Nessus	Huawei Local Security Checks	critical
99753	openSUSE Security Update : ruby2.1 (openSUSE-2017-527)	Nessus	SuSE Local Security Checks	critical
99578	SUSE SLED12 / SLES12 Security Update : ruby2.1 (SUSE-SU-2017:1067-1)	Nessus	SuSE Local Security Checks	critical
99208	openSUSE Security Update : ruby2.2 / ruby2.3 (openSUSE-2017-435)	Nessus	SuSE Local Security Checks	critical

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