// For flags

CVE-2023-22796

rubygem-activesupport: Regular Expression Denial of Service

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method can cause the regular expression engine to enter a state of catastrophic backtracking. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability.

A flaw was found in rubygem-activesupport. RubyGem's activesupport gem is vulnerable to a denial of service caused by a regular expression denial of service (ReDoS) flaw in Inflector.underscore. By sending a specially-crafted regex input, a remote attacker can use large amounts of CPU and memory, resulting in a denial of service.

Red Hat OpenShift bug fix and security update. Red Hat Product Security has rated this update as having a security impact of Low. Issues addressed include a denial of service vulnerability.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-01-06 CVE Reserved
  • 2023-02-09 CVE Published
  • 2024-11-27 CVE Updated
  • 2025-04-01 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-1333: Inefficient Regular Expression Complexity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Activesupport Project
Search vendor "Activesupport Project"
 Activesupport
Search vendor "Activesupport Project" for product "Activesupport"
 < 6.1.7.1
Search vendor "Activesupport Project" for product "Activesupport" and version " < 6.1.7.1"
ruby
Affected
Activesupport Project
Search vendor "Activesupport Project"
 Activesupport
Search vendor "Activesupport Project" for product "Activesupport"
 >= 7.0.0 < 7.0.4.1
Search vendor "Activesupport Project" for product "Activesupport" and version " >= 7.0.0 < 7.0.4.1"
ruby
Affected