CVE-2022-34749

2023-12-2020:00:32

redhat.com

access.redhat.com

cve-2022-34749

regular expression denial of service

mistune

backtrack

denial of service

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

6.8 Medium

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

46.0%

JSON

A regular expression denial of service (ReDoS) flaw was found in the asteris emphasis regular expression implementation in Mistune. By sending specially-crafted regex input, a remote attacker could invoke a catastrophic backtrack, resulting in a denial of service.