CVE-2021-44686

2021-12-0700:15:08

Debian Security Bug Tracker

security-tracker.debian.org

calibre

redos

vulnerability

html_preprocess_rules

ebooks

conversion

preprocess

python

unix

CVSS2

Attack Vector

NETWORK

Attack 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

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

EPSS

0.002

Percentile

62.2%

JSON

calibre before 5.32.0 contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service) in html_preprocess_rules in ebooks/conversion/preprocess.py.

OSVersionArchitecturePackageVersionFilename
Debian12allcalibre< 5.33.0+dfsg-1calibre_5.33.0+dfsg-1_all.deb
Debian11allcalibre< 5.12.0+dfsg-1+deb11u3calibre_5.12.0+dfsg-1+deb11u3_all.deb
Debian999allcalibre< 5.33.0+dfsg-1calibre_5.33.0+dfsg-1_all.deb
Debian13allcalibre< 5.33.0+dfsg-1calibre_5.33.0+dfsg-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	calibre	< 5.33.0+dfsg-1	calibre_5.33.0+dfsg-1_all.deb
Debian	11	all	calibre	< 5.12.0+dfsg-1+deb11u3	calibre_5.12.0+dfsg-1+deb11u3_all.deb
Debian	999	all	calibre	< 5.33.0+dfsg-1	calibre_5.33.0+dfsg-1_all.deb
Debian	13	all	calibre	< 5.33.0+dfsg-1	calibre_5.33.0+dfsg-1_all.deb