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Active Record subject to Regular Expression Denial-of-Service (ReDoS)

High severity GitHub Reviewed Published Mar 2, 2021 to the GitHub Advisory Database • Updated Jul 3, 2023

Package

bundler activerecord (RubyGems)

Affected versions

>= 5.0.0, <= 5.2.4.4
>= 6.0.0, <= 6.0.3.4
>= 6.1.0, <= 6.1.2.0

Patched versions

5.2.4.5
6.0.3.5
6.1.2.1

Description

The PostgreSQL adapter in Active Record before 6.1.2.1, 6.0.3.5, 5.2.4.5 suffers from a regular expression denial of service (REDoS) vulnerability. Carefully crafted input can cause the input validation in the money type of the PostgreSQL adapter in Active Record to spend too much time in a regular expression, resulting in the potential for a DoS attack. This only impacts Rails applications that are using PostgreSQL along with money type columns that take user input.

References

Published by the National Vulnerability Database Feb 11, 2021
Reviewed Mar 2, 2021
Published to the GitHub Advisory Database Mar 2, 2021
Last updated Jul 3, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.721%
(80th percentile)

Weaknesses

CVE ID

CVE-2021-22880

GHSA ID

GHSA-8hc4-xxm3-5ppp

Source code

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