CVE Vulnerabilities

CVE-2022-21670

Uncontrolled Resource Consumption

Published: Jan 10, 2022 | Modified: Nov 21, 2024
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu
LOW

markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.

Weakness

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

Affected Software

Name Vendor Start Version End Version
Markdown-it Markdown-it_project * 12.3.1 (including)
Node-markdown-it Ubuntu hirsute *
Node-markdown-it Ubuntu impish *
Node-markdown-it Ubuntu kinetic *
Node-markdown-it Ubuntu lunar *
Node-markdown-it Ubuntu mantic *
Node-markdown-it Ubuntu oracular *
Node-markdown-it Ubuntu trusty *
Node-markdown-it Ubuntu xenial *

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