CVE Vulnerabilities

CVE-2021-22902

Uncontrolled Resource Consumption

Published: Jun 11, 2021 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM

The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Name Vendor Start Version End Version
Rails Rubyonrails 6.0.0 (including) 6.0.3.7 (excluding)
Rails Rubyonrails 6.1.0 (including) 6.1.0.2 (excluding)
Red Hat Satellite 6.10 for RHEL 7 RedHat tfm-rubygem-rails-0:6.0.3.7-1.el7sat *
Rails Ubuntu bionic *
Rails Ubuntu focal *
Rails Ubuntu groovy *
Rails Ubuntu hirsute *
Rails Ubuntu impish *
Rails Ubuntu kinetic *
Rails Ubuntu lunar *
Rails Ubuntu mantic *
Rails Ubuntu oracular *
Rails Ubuntu trusty *
Rails Ubuntu xenial *
Rails-4.0 Ubuntu trusty *
Ruby-actionpack-3.2 Ubuntu trusty *
Ruby-activemodel-3.2 Ubuntu trusty *
Ruby-activerecord-3.2 Ubuntu trusty *
Ruby-activesupport-3.2 Ubuntu trusty *
Ruby-rails-3.2 Ubuntu trusty *

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References