Bug 2006336 (CVE-2021-3803)

Summary:	CVE-2021-3803 nodejs-nth-check: inefficient regular expression complexity
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anpicker, aos-bugs, bmontgom, caswilli, eparis, fjansen, gparvin, jburrell, jramanat, jsmith.fedora, jwong, kaycoth, michal.skrivanek, mperina, nodejs-sig, nstielau, pahickey, psegedy, rcernich, rfreiman, sgratch, spasquie, sponnaga, stcannon, tcarlin, vmugicag
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	nth-check 2.0.1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in nth-check nodejs library where it could lead to consuming a big amount of resources when executing some checks. Attackers could take advantage of this by crafting an invalid CSS nth-checks causing a disruption or a denial of service (DoS).	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2006338, 2006337, 2009020, 2009021, 2013367, 2013368, 2013369, 2013370, 2013371, 2013372, 2013373, 2013374, 2015725, 2015726, 2015727
Bug Blocks:	2006340

Description Guilherme de Almeida Suckevicz 2021-09-21 13:58:27 UTC

nth-check is vulnerable to Inefficient Regular Expression Complexity

Reference:
https://huntr.dev/bounties/8cf8cc06-d2cf-4b4e-b42c-99fafb0b04d0

Upstream patch:
https://github.com/fb55/nth-check/commit/9894c1d2010870c351f66c6f6efcf656e26bb726

Comment 1 Guilherme de Almeida Suckevicz 2021-09-21 13:59:15 UTC

Created nodejs-nth-check tracking bugs for this issue:

Affects: epel-7 [bug 2006338]
Affects: fedora-33 [bug 2006337]