CVE-2024-27280

A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.

An issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4.

The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value.

This vulnerability is not affected StringIO 3.0.3 and later, and Ruby 3.2.x and later.

We recommend to update the StringIO gem to version 3.0.3 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 stringio 3.0.1.1
• For Ruby 3.1 users: Update to stringio 3.1.0.2

You can use gem update stringio to update it. If you are using bundler, please add gem "stringio", ">= 3.0.1.2" to your Gemfile.

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.

A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.

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.

• CVE-2024-27280: fix buffer over-read in StringIO#ungetc/#ungetbyte by correcting the buffer expansion size in strio_unget_bytes

A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.

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.

Root has patched CVE-2024-27280 in the stringio package for Root:Ruby. Multiple fixed versions available.

It was discovered that Ruby incorrectly handled the ungetbyte and ungetc methods. A remote attacker could use this issue to cause Ruby to crash, resulting in a denial of service, or possibly obtain sensitive information.

It was discovered that Ruby incorrectly handled certain IO stream methods. A remote attacker could use this issue to cause Ruby to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 18.04 LTS. (CVE-2024-27280)

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. This issue only affected Ubuntu 18.04 LTS. (CVE-2024-27282)

It was discovered that Ruby incorrectly handled parsing of certain XML characters through the REXML gem. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2024-35176)

It was discovered that Ruby incorrectly handled decompressed domain names within a DNS packet. An attacker could use this issue to cause Ruby to crash, resulting in a denial of service. (CVE-2025-24294)