Several vulnerabilities have been discovered in rubygems embedded in ruby2.1, the interpreted scripting language.

CVE-2019-8320

A Directory Traversal issue was discovered in RubyGems. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination.

CVE-2019-8322

The gem owner command outputs the contents of the API response directly to stdout. Therefore, if the response is crafted, escape sequence injection may occur.

CVE-2019-8323

Gem::GemcutterUtilities#with_response may output the API response to stdout as it is. Therefore, if the API side modifies the response, escape sequence injection may occur.

CVE-2019-8324

A crafted gem with a multi-line name is not handled correctly.
Therefore, an attacker could inject arbitrary code to the stub line of gemspec, which is eval-ed by code in ensure_loadable_spec during the preinstall check.

CVE-2019-8325

An issue was discovered in RubyGems 2.6 and later through 3.0.2. Since Gem::CommandManager#run calls alert_error without escaping, escape sequence injection is possible. (There are many ways to cause an error.)

For Debian 8 'Jessie', these problems have been fixed in version 2.1.5-2+deb8u7.

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.

Several vulnerabilities have been discovered in the Rubygems included in the interpreter for the Ruby language, which may result in denial of service or the execution of arbitrary code.

An issue was discovered in RubyGems. The gem owner command outputs the contents of the API response directly to stdout. Therefore, if the response is crafted, escape sequence injection may occur.(CVE-2019-8322)

An issue was discovered in RubyGems.
Gem::GemcutterUtilities#with_response may output the API response to stdout as it is. Therefore, if the API side modifies the response, escape sequence injection may occur.(CVE-2019-8323)

An issue was discovered in RubyGems. Since Gem::UserInteraction#verbose calls say without escaping, escape sequence injection is possible.(CVE-2019-8321)

A Directory Traversal issue was discovered in RubyGems. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.(CVE-2019-8320)

An issue was discovered in RubyGems. A crafted gem with a multi-line name is not handled correctly. Therefore, an attacker could inject arbitrary code to the stub line of gemspec, which is eval-ed by code in ensure_loadable_spec during the preinstall check.(CVE-2019-8324)

An issue was discovered in RubyGems. Since Gem::CommandManager#run calls alert_error without escaping, escape sequence injection is possible. (There are many ways to cause an error.)(CVE-2019-8325)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new     directories or touching files (which now include path-checking code for symlinks), it would delete the     target destination. If that destination was hidden behind a symlink, a malicious gem could delete     arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently     gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely     lead to data loss or an unusable system. (CVE-2019-8320)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
123522	Debian DLA-1735-1 : ruby2.1 security update	Nessus	Debian Local Security Checks	2019/4/1	2024/6/7	high
124096	Debian DSA-4433-1 : ruby2.3 - security update	Nessus	Debian Local Security Checks	2019/4/17	2024/6/3	high
127811	Amazon Linux AMI : ruby20 / ruby21, ruby24 (ALAS-2019-1255)	Nessus	Amazon Linux Local Security Checks	2019/8/13	2024/5/6	high
252604	Linux Distros Unpatched Vulnerability : CVE-2019-8320	Nessus	Misc.	2025/8/20	2025/9/1	high

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