Bug 1193469 – VUL-1: 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.

Bug 1193469 - (CVE-2021-44686) VUL-1: 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.

(CVE-2021-44686)
Summary:	VUL-1: CVE-2021-44686: calibre before 5.32.0 contains a regular expression th...

Status:	RESOLVED INVALID

Classification:	openSUSE
Product:	openSUSE Distribution
Classification:	openSUSE
Component:	Security
Version:	Leap 15.2
Hardware:	Other Other

Priority:	P4 - Low Severity: Minor (vote)
Target Milestone:	---
Assigned To:	Eric Schirra
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/316416/
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Reported:	2021-12-07 10:42 UTC by Carlos López
Modified:	2022-03-19 11:56 UTC (History)
CC List:	3 users (show)

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Found By:	Security Response Team
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Description Carlos López 2021-12-07 10:42:41 UTC

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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44686
http://www.cvedetails.com/cve/CVE-2021-44686/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44686
https://github.com/dwisiswant0/advisory/issues/18
https://github.com/kovidgoyal/calibre/compare/v5.31.1...v5.32.0
https://bugs.launchpad.net/calibre/+bug/1951979

Comment 1 Carlos López 2021-12-07 10:44:14 UTC

Affected codestreams:
 - openSUSE:Backports:SLE-15-SP2
 - openSUSE:Leap:15.2
 - openSUSE:Leap:15.3
 - openSUSE:Leap:15.4

Fix already introduced in openSUSE:Factory. Upstream commit:
https://github.com/kovidgoyal/calibre/commit/235b7e38c197ba4a3c17531e516610af8795e348

Comment 2 Andreas Stieger 2022-03-19 11:56:26 UTC

we were are 3.48.0 or later