Several vulnerabilities were discovered in jruby, a Java implementation of the Ruby programming language. They would allow an attacker to use specially crafted gem files to mount cross-site scripting attacks, cause denial of service through an infinite loop, write arbitrary files, or run malicious code.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2028 advisory.

    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):

    * ruby: HTTP response splitting in WEBrick (CVE-2017-17742)

    * ruby: DoS by large request in WEBrick (CVE-2018-8777)

    * ruby: Buffer under-read in String#unpack (CVE-2018-8778)

    * ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)

    * ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives     (CVE-2018-16396)

    * rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)

    * rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on     specially crafted YAML (CVE-2018-1000074)

    * rubygems: Improper verification of signatures in tarball allows to install mis-signed gem     (CVE-2018-1000076)

    * rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage     URL (CVE-2018-1000077)

    * rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)

    * rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations     (CVE-2018-1000079)

    * ruby: Unintentional file and directory creation with directory traversal in tempfile and tmpdir     (CVE-2018-6914)

    * ruby: Unintentional socket creation by poisoned NULL byte in UNIXServer and UNIXSocket (CVE-2018-8779)

    * rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service     (CVE-2018-1000075)

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

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes     linked from 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.

The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3730 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-ruby24-ruby (2.4.5), rh-     ruby24-rubygems (2.6.14.3), rh-ruby24-rubygem-bigdecimal (1.3.2), rh-ruby24-rubygem-openssl (2.0.9).
    (BZ#1650590)

    Security Fix(es):

    * ruby: OpenSSL::X509::Name equality check does not work correctly (CVE-2018-16395)

    * ruby: HTTP response splitting in WEBrick (CVE-2017-17742)

    * ruby: DoS by large request in WEBrick (CVE-2018-8777)

    * ruby: Buffer under-read in String#unpack (CVE-2018-8778)

    * ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)

    * ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives     (CVE-2018-16396)

    * rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)

    * rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on     specially crafted YAML (CVE-2018-1000074)

    * rubygems: Improper verification of signatures in tarball allows to install mis-signed gem     (CVE-2018-1000076)

    * rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage     URL (CVE-2018-1000077)

    * rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)

    * rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations     (CVE-2018-1000079)

    * ruby: Unintentional file and directory creation with directory traversal in tempfile and tmpdir     (CVE-2018-6914)

    * ruby: Unintentional socket creation by poisoned NULL byte in UNIXServer and UNIXSocket (CVE-2018-8779)

    * rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service     (CVE-2018-1000075)

    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.

The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3729 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 (2.3.8), rh-     ruby23-rubygems (2.5.2.3). (BZ#1650591)

    Security Fix(es):

    * ruby: OpenSSL::X509::Name equality check does not work correctly (CVE-2018-16395)

    * ruby: HTTP response splitting in WEBrick (CVE-2017-17742)

    * ruby: DoS by large request in WEBrick (CVE-2018-8777)

    * ruby: Buffer under-read in String#unpack (CVE-2018-8778)

    * ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)

    * ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives     (CVE-2018-16396)

    * rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)

    * rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on     specially crafted YAML (CVE-2018-1000074)

    * rubygems: Improper verification of signatures in tarball allows to install mis-signed gem     (CVE-2018-1000076)

    * rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage     URL (CVE-2018-1000077)

    * rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)

    * rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations     (CVE-2018-1000079)

    * ruby: Unintentional file and directory creation with directory traversal in tempfile and tmpdir     (CVE-2018-6914)

    * ruby: Unintentional socket creation by poisoned NULL byte in UNIXServer and UNIXSocket (CVE-2018-8779)

    * rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service     (CVE-2018-1000075)

    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.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-2028 advisory.

    - Introduce 'Gem::UserInteraction#verbose' method as precondition to fix       CVE-2019-8321.
      * rubygems-2.3.0-refactor-checking-really_verbose.patch
    - Fix escape sequence injection vulnerability in gem owner.
      Resolves: CVE-2019-8322
    - Fix escape sequence injection vulnerability in API response handling.
      Resolves: CVE-2019-8323
    - Prohibit arbitrary code execution when installing a malicious gem.
      Resolves: CVE-2019-8324

Tenable has extracted the preceding description block directly from the Oracle 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.

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2019-4276:03 advisory.

    * ruby: HTTP response splitting in WEBrick (CVE-2017-17742)
      * ruby: DoS by large request in WEBrick (CVE-2018-8777)
      * ruby: Buffer under-read in String#unpack (CVE-2018-8778)
      * ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)
      * ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives     (CVE-2018-16396)
      * rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)
      * rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution     on specially crafted YAML (CVE-2018-1000074)
      * rubygems: Improper verification of signatures in tarball allows to install mis-signed gem     (CVE-2018-1000076)
      * rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid     homepage URL (CVE-2018-1000077)
      * rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)
      * rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem     locations (CVE-2018-1000079)
      * ruby: Unintentional file and directory creation with directory traversal in tempfile and tmpdir     (CVE-2018-6914)
      * ruby: Unintentional socket creation by poisoned NULL byte in UNIXServer and UNIXSocket (CVE-2018-8779)
      * rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service     (CVE-2018-1000075)

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

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:0591 advisory.

    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):

    * ruby: DoS by large request in WEBrick (CVE-2018-8777)

    * ruby: Unintentional directory traversal by poisoned NULL byte in Dir (CVE-2018-8780)

    * rubygems: Path traversal when writing to a symlinked basedir outside of the root (CVE-2018-1000073)

    * rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on     specially crafted YAML (CVE-2018-1000074)

    * rubygems: Improper verification of signatures in tarball allows to install mis-signed gem     (CVE-2018-1000076)

    * rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage     URL (CVE-2018-1000077)

    * rubygems: XSS vulnerability in homepage attribute when displayed via gem server (CVE-2018-1000078)

    * rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations     (CVE-2018-1000079)

    * rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service     (CVE-2018-1000075)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, 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.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has ruby packages installed that are affected by multiple vulnerabilities:

  - In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before     2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an     attacker controlling the unpacking format (similar to     format string vulnerabilities) can trigger a buffer     under-read in the String#unpack method, resulting in a     massive and controlled information disclosure.
    (CVE-2018-8778)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Directory     Traversal vulnerability in install_location function of     package.rb that can result in path traversal when     writing to a symlinked basedir outside of the root. This     vulnerability appears to have been fixed in 2.7.6.
    (CVE-2018-1000073)

  - In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before     2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, the     Dir.open, Dir.new, Dir.entries and Dir.empty? methods do     not check NULL characters. When using the corresponding     method, unintentional directory traversal may be     performed. (CVE-2018-8780)

  - Directory traversal vulnerability in the Dir.mktmpdir     method in the tmpdir library in Ruby before 2.2.10,     2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before     2.5.1, and 2.6.0-preview1 might allow attackers to     create arbitrary directories or files via a .. (dot dot)     in the prefix argument. (CVE-2018-6914)

  - In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before     2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an     attacker can pass a large HTTP request with a crafted     header to WEBrick server or a crafted body to WEBrick     server/handler and cause a denial of service (memory     consumption). (CVE-2018-8777)

  - Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before     2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 allows an     HTTP Response Splitting attack. An attacker can inject a     crafted key and value into an HTTP response for the HTTP     server of WEBrick. (CVE-2017-17742)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Deserialization     of Untrusted Data vulnerability in owner command that     can result in code execution. This attack appear to be     exploitable via victim must run the `gem owner` command     on a gem with a specially crafted YAML file. This     vulnerability appears to have been fixed in 2.7.6.
    (CVE-2018-1000074)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Cross Site     Scripting (XSS) vulnerability in gem server display of     homepage attribute that can result in XSS. This attack     appear to be exploitable via the victim must browse to a     malicious gem on a vulnerable gem server. This     vulnerability appears to have been fixed in 2.7.6.
    (CVE-2018-1000078)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Directory     Traversal vulnerability in gem installation that can     result in the gem could write to arbitrary filesystem     locations during installation. This attack appear to be     exploitable via the victim must install a malicious gem.
    This vulnerability appears to have been fixed in 2.7.6.
    (CVE-2018-1000079)

  - 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)

  - In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before     2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, the     UNIXServer.open and UNIXSocket.open methods are not     checked for null characters. It may be connected to an     unintended socket. (CVE-2018-8779)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a infinite loop     caused by negative size vulnerability in ruby gem     package tar header that can result in a negative size     could cause an infinite loop.. This vulnerability     appears to have been fixed in 2.7.6. (CVE-2018-1000075)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Improper     Verification of Cryptographic Signature vulnerability in     package.rb that can result in a mis-signed gem could be     installed, as the tarball would contain multiple gem     signatures.. This vulnerability appears to have been     fixed in 2.7.6. (CVE-2018-1000076)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Improper Input     Validation vulnerability in ruby gems specification     homepage attribute that can result in a malicious gem     could set an invalid homepage URL. This vulnerability     appears to have been fixed in 2.7.6. (CVE-2018-1000077)

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

Multiple vulnerabilities were found in rubygems, a package management framework for Ruby. 

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 1.8.24-1+deb7u2.

We recommend that you upgrade your rubygems 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.

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

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a infinite loop     caused by negative size vulnerability in ruby gem     package tar header that can result in a negative size     could cause an infinite loop.. This vulnerability     appears to have been fixed in 2.7.6.(CVE-2018-1000075)

  - RubyGems version Ruby 2.2 series: 2.2.9 and earlier,     Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series:
    2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier,     prior to trunk revision 62422 contains a Improper     Verification of Cryptographic Signature vulnerability     in package.rb that can result in a mis-signed gem could     be installed, as the tarball would contain multiple gem     signatures.. This vulnerability appears to have been     fixed in 2.7.6.(CVE-2018-1000076)

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.

Security Fix(es) :

  - ruby: HTTP response splitting in WEBrick     (CVE-2017-17742)

  - ruby: DoS by large request in WEBrick (CVE-2018-8777)

  - ruby: Buffer under-read in String#unpack (CVE-2018-8778)

  - ruby: Unintentional directory traversal by poisoned NULL     byte in Dir (CVE-2018-8780)

  - ruby: Tainted flags are not propagated in Array#pack and     String#unpack with some directives (CVE-2018-16396)

  - rubygems: Path traversal when writing to a symlinked     basedir outside of the root (CVE-2018-1000073)

  - rubygems: Unsafe Object Deserialization Vulnerability in     gem owner allowing arbitrary code execution on specially     crafted YAML (CVE-2018-1000074)

  - rubygems: Improper verification of signatures in tarball     allows to install mis-signed gem (CVE-2018-1000076)

  - rubygems: Missing URL validation on spec home attribute     allows malicious gem to set an invalid homepage URL     (CVE-2018-1000077)

  - rubygems: XSS vulnerability in homepage attribute when     displayed via gem server (CVE-2018-1000078)

  - rubygems: Path traversal issue during gem installation     allows to write to arbitrary filesystem locations     (CVE-2018-1000079)

  - ruby: Unintentional file and directory creation with     directory traversal in tempfile and tmpdir     (CVE-2018-6914)

  - ruby: Unintentional socket creation by poisoned NULL     byte in UNIXServer and UNIXSocket (CVE-2018-8779)

  - rubygems: Infinite loop vulnerability due to negative     size in tar header causes Denial of Service     (CVE-2018-1000075)

ID	名前	製品	ファミリー	公開日	更新日	深刻度
110418	Debian DSA-4219-1 : jruby - security update	Nessus	Debian Local Security Checks	2018/6/11	2024/9/24	critical
127649	RHEL 7 : ruby (RHSA-2019:2028)	Nessus	Red Hat Local Security Checks	2019/8/12	2024/11/7	critical
194017	RHEL 6 / 7 : rh-ruby24-ruby (RHSA-2018:3730)	Nessus	Red Hat Local Security Checks	2024/4/27	2024/11/5	critical
194048	RHEL 6 / 7 : rh-ruby23-ruby (RHSA-2018:3729)	Nessus	Red Hat Local Security Checks	2024/4/27	2024/11/5	critical
180804	Oracle Linux 7 : ruby (ELSA-2019-2028)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2024/11/1	critical
290108	MiracleLinux 7 : ruby-2.0.0.648-36.el7 (AXSA:2019-4276:03)	Nessus	Miracle Linux Local Security Checks	2026/1/16	2026/1/16	critical
134063	RHEL 7 : ruby (RHSA-2020:0591)	Nessus	Red Hat Local Security Checks	2020/2/26	2024/11/7	critical
131412	NewStart CGSL CORE 5.04 / MAIN 5.04 : ruby Multiple Vulnerabilities (NS-SA-2019-0221)	Nessus	NewStart CGSL Local Security Checks	2019/12/2	2022/5/18	critical
108770	Debian DLA-1336-1 : rubygems security update	Nessus	Debian Local Security Checks	2018/4/2	2024/11/22	critical
110147	EulerOS 2.0 SP1 : ruby (EulerOS-SA-2018-1143)	Nessus	Huawei Local Security Checks	2018/5/29	2024/10/1	critical
128260	Scientific Linux Security Update : ruby on SL7.x x86_64 (20190806)	Nessus	Scientific Linux Local Security Checks	2019/8/27	2024/5/1	critical

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