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)

According to the versions of the ruby packages installed, the EulerOS 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)

  - 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)

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 host is running a version of macOS / Mac OS X that is 10.13.x prior to 10.13.6. It is, therefore, affected by multiple vulnerabilities.

Note that successful exploitation of the most serious issues can result in arbitrary code execution.

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

  - 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)

  - 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 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 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 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)

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

An update of the ruby package has been released.

The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:3485 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 (2.4.2).
    (BZ#1506785)

    Security Fix(es):

    * 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)

    * 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)

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 Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3439-1 advisory.

    It was discovered that Ruby incorrectly handled certain inputs. An attacker could use this to cause a     buffer overrun. (CVE-2017-0898)

    Yusuke Endoh discovered that Ruby incorrectly handled certain files. An attacker could use this to execute     terminal escape sequences. (CVE-2017-0899)

    Yusuke Endoh discovered that Ruby incorrectly handled certain inputs. An attacker could use this to cause     a denial of service. (CVE-2017-0900)

    It was discovered that Ruby incorrectly handled certain files. An attacker could use this to overwrite any     file on the filesystem. (CVE-2017-0901)

    It was discovered that Ruby incorrectly handled certain inputs. An attacker could use this to execute     arbitrary code. (CVE-2017-10784)

    It was discovered that Ruby incorrectly handled certain inputs. An attacker could use this to cause a     denial of service. (CVE-2017-14033)

    It was discovered that Ruby incorrectly handled certain files. An attacker could use this to expose     sensitive information. (CVE-2017-14064)

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.

ID	名稱	產品	系列	已發布	已更新	嚴重性
107084	Scientific Linux Security Update : ruby on SL7.x x86_64 (20180228)	Nessus	Scientific Linux Local Security Checks	2018/3/1	2025/10/27	critical
108471	EulerOS 2.0 SP2 : ruby (EulerOS-SA-2018-1067)	Nessus	Huawei Local Security Checks	2018/3/20	2025/1/28	critical
111137	macOS 10.13.x < 10.13.6 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	2018/7/17	2024/9/4	critical
127164	NewStart CGSL MAIN 5.04 : ruby Multiple Vulnerabilities (NS-SA-2019-0013)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2022/5/19	critical
121736	Photon OS 1.0: Ruby PHSA-2017-0037	Nessus	PhotonOS Local Security Checks	2019/2/7	2024/7/23	critical
194088	RHEL 6 / 7 : rh-ruby24-ruby (RHSA-2017:3485)	Nessus	Red Hat Local Security Checks	2024/4/27	2025/4/15	critical
103692	Ubuntu 14.04 LTS : Ruby vulnerabilities (USN-3439-1)	Nessus	Ubuntu Local Security Checks	2017/10/6	2024/8/27	critical

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