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redhatcveRedhat.comRH:CVE-2022-34749
HistoryDec 20, 2023 - 8:00 p.m.

CVE-2022-34749

2023-12-2020:00:32
redhat.com
access.redhat.com
7
cve-2022-34749
regular expression denial of service
mistune
backtrack
denial of service

CVSS3

7.5

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

46.7%

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.

CVSS3

7.5

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

46.7%