Bug 1893298 (CVE-2020-7760)

Summary:	CVE-2020-7760 codemirror: ReDoS in tokenBase function in javascript.js
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abenaiss, adam.kaplan, aos-bugs, bmontgom, cmeyers, eparis, extras-orphan, gblomqui, gmainwar, java-sig-commits, jburrell, jokerman, mabashia, mcooper, mizdebsk, moceap, msrb, notting, nstielau, pbhattac, rpetrell, smcdonal, sponnaga, vbobade, viktor.vix.jancik, wzheng
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	codemirror 5.58.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-09 20:21:17 UTC	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:	1893301, 1893300
Bug Blocks:	1893302

Description Guilherme de Almeida Suckevicz 2020-10-30 16:46:17 UTC

This affects the package codemirror between versions 5.32.0 to 5.58.1 inclusive; the package org.apache.marmotta.webjars:codemirror before 5.58.2.
 The vulnerable regular expression is located in https://github.com/codemirror/CodeMirror/blob/cdb228ac736369c685865b122b736cd0d397836c/mode/javascript/javascript.js#L129. The ReDOS vulnerability of the regex is mainly due to the sub-pattern (s|/*.*?*/)*

Reference:
https://snyk.io/vuln/SNYK-JS-CODEMIRROR-1016937

Upstream patch:
https://github.com/codemirror/CodeMirror/commit/55d0333907117c9231ffdf555ae8824705993bbb

Comment 1 Guilherme de Almeida Suckevicz 2020-10-30 16:46:58 UTC

Created nodejs-codemirror tracking bugs for this issue:

Affects: epel-all [bug 1893301]
Affects: fedora-all [bug 1893300]

Comment 2 Mark Cooper 2020-11-02 01:36:58 UTC

External References:

https://snyk.io/vuln/SNYK-JS-CODEMIRROR-1016937

Comment 6 Product Security DevOps Team 2020-11-09 20:21:17 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-7760