VDB-232676 · CVE-2023-36617 · EUVD-2023-1827

Ruby up to 0.12.1 Incomplete Fix CVE-2023-28755 rfc2396_parser.rb redos

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Ruby up to 0.12.1. This issue affects some unknown processing of the file rfc2396_parser.rb of the component Incomplete Fix CVE-2023-28755. Such manipulation leads to redos. This vulnerability is documented as CVE-2023-36617. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Ruby up to 0.12.1 (Programming Language Software). It has been rated as problematic. Affected by this issue is an unknown part of the file rfc2396_parser.rb of the component Incomplete Fix CVE-2023-28755. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

The weakness was released 06/29/2023. The advisory is shared for download at ruby-lang.org. This vulnerability is handled as CVE-2023-36617 since 06/25/2023. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1449.003.

The vulnerability scanner Nessus provides a plugin with the ID 215030 (Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-839)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.12.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (215030) and EUVD (EUVD-2023-1827). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Programming Language Software

Name

Ruby

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 215030
Nessus Name: Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-839)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ruby 0.12.2

Timelineinfo

06/25/2023 🔍
06/29/2023 +4 days 🔍
06/29/2023 +0 days 🔍
07/17/2025 +749 days 🔍

Sourcesinfo

Advisory: ruby-lang.org
Status: Confirmed

CVE: CVE-2023-36617 (🔍)
GCVE (CVE): GCVE-0-2023-36617
GCVE (VulDB): GCVE-100-232676
EUVD: 🔍

Entryinfo

Created: 06/29/2023 15:36
Updated: 07/17/2025 21:26
Changes: 06/29/2023 15:36 (40), 07/21/2023 11:40 (11), 02/06/2025 04:25 (17), 07/17/2025 21:26 (1)
Complete: 🔍
Cache ID: 216::103