CVE-2024-27281

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users, a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users, a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users, a fixed version is rdoc 6.5.1.1.

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0.

When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored.

When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.

We recommend to update the RDoc gem to version 6.6.3.1 or later. In order to ensure compatibility with bundled version in older Ruby series, you may update as follows instead:

• For Ruby 3.0 users: Update to rdoc 6.3.4.1
• For Ruby 3.1 users: Update to rdoc 6.4.1.1
• For Ruby 3.2 users: Update to rdoc 6.5.1.1

You can use gem update rdoc to update it. If you are using bundler, please add gem "rdoc", ">= 6.6.3.1" to your Gemfile.

Note: 6.3.4, 6.4.1, 6.5.1 and 6.6.3 have a incorrect fix. We recommend to upgrade 6.3.4.1, 6.4.1.1, 6.5.1.1 and 6.6.3.1 instead of them.

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).

Security Fix(es):

A buffer overread flaw was found in rubygem StringIO. The ungetbyte and ungetc methods on a StringIO object can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value.(CVE-2024-27280)

A flaw was found in Rubygem RDoc. When parsing .rdoc_options used for configuration in RDoc as a YAML file there are no restrictions on the classes that can be restored. This issue may lead to object injection, resulting in remote code execution.(CVE-2024-27281)

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: ruby (3.1). (Rocky Linux-35449)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)

• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)

• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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: ruby (3.3). (Rocky Linux-37697)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)

• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)

• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users, a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users, a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users, a fixed version is rdoc 6.5.1.1.

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/cgi-gem: HTTP response splitting in CGI (CVE-2021-33621)
• ruby: ReDoS vulnerability in URI (CVE-2023-28755)
• ruby: ReDoS vulnerability in Time (CVE-2023-28756)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

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: ruby (3.1). (AlmaLinux-35449)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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: ruby (3.3). (AlmaLinux-37446)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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: ruby (3.3). (AlmaLinux-37697)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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: ruby (3.0). (AlmaLinux-35740)

Security Fix(es):

• ruby/cgi-gem: HTTP response splitting in CGI (CVE-2021-33621)
• ruby: ReDoS vulnerability in URI (CVE-2023-28755)
• ruby: ReDoS vulnerability in Time (CVE-2023-28756)
• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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):

• rubygem-uri: ReDoS vulnerability - upstream's incomplete fix for CVE-2023-28755 (CVE-2023-36617)
• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)
• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)
• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)
• REXML: DoS parsing an XML with many <s in an attribute value (CVE-2024-35176)

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.

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users, a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users, a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users, a fixed version is rdoc 6.5.1.1.

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users, a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users, a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users, a fixed version is rdoc 6.5.1.1.

• CVE-2024-27281: fix object injection and remote code execution in .rdoc_options and documentation cache loading

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users, a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users, a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users, a fixed version is rdoc 6.5.1.1.

Buffer overread vulnerability in StringIO. (CVE-2024-27280) RCE vulnerability with .rdoc_options in RDoc. (CVE-2024-27281) Arbitrary memory address read vulnerability with Regex search. (CVE-2024-27282)

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: ruby (3.3). (Rocky Linux-37446)

Security Fix(es):

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)

• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)

• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

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.

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):

• rubygem-uri: ReDoS vulnerability - upstream's incomplete fix for CVE-2023-28755 (CVE-2023-36617)

• ruby: Buffer overread vulnerability in StringIO (CVE-2024-27280)

• ruby: RCE vulnerability with .rdoc_options in RDoc (CVE-2024-27281)

• ruby: Arbitrary memory address read vulnerability with Regex search (CVE-2024-27282)

• REXML: DoS parsing an XML with many <s in an attribute value (CVE-2024-35176)

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.

It was discovered that Ruby RDoc incorrectly parsed certain YAML files. If a user or automated system were tricked into parsing a specially crafted .rdoc_options file, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2024-27281)

It was discovered that the Ruby regex compiler incorrectly handled certain memory operations. A remote attacker could possibly use this issue to obtain sensitive memory contents. (CVE-2024-27282)

USN-6838-1 fixed CVE-2024-27281 in Ruby 2.7, Ruby 3.0, Ruby 3.1, and Ruby 3.2. This update provides the corresponding updates for Ruby 2.3 and Ruby 2.5.

Original advisory details:

It was discovered that Ruby RDoc incorrectly parsed certain YAML files. If a user or automated system were tricked into parsing a specially crafted .rdoc_options file, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2024-27281)