CVE Vulnerability

CVE-2021-44686

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugs.launchpad.net/calibre/+bug/1951979 Exploit Issue Tracking
https://github.com/dwisiswant0/advisory/issues/18 Exploit Issue Tracking
https://github.com/kovidgoyal/calibre/compare/v5.31.1...v5.32.0 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W7QKFPYJ23KG6WJ5NIYAM4N2NWZCLQGL/ Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Information

Published : 2021-12-07 12:15

Updated : 2022-05-03 04:04

NVD link : CVE-2021-44686

Mitre link : CVE-2021-44686

Products Affected
No products.
CWE
CWE-400