Bug 1329533 (CVE-2015-8854)

Summary:	CVE-2015-8854 marked: regular expression denial of service
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	tchollingsworth
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	marked 0.3.4	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:50:55 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1329534, 1329535, 1329537
Bug Blocks:

Description Andrej Nemec 2016-04-22 07:56:59 UTC

Marked 0.3.3 and earlier is vulnerable to regular expression denial of service (ReDoS) when certain types of input are passed in to be parsed.

"The Regular expression Denial of Service (ReDoS) is a Denial of Service attack, that exploits the fact that most Regular Expression implementations may reach extreme situations that cause them to work very slowly (exponentially related to input size). An attacker can then cause a program using a Regular Expression to enter these extreme situations and then hang for a very long time."

External references:

https://nodesecurity.io/advisories/23
https://github.com/chjj/marked/issues/497

Comment 1 Andrej Nemec 2016-04-22 07:57:27 UTC

Created marked tracking bugs for this issue:

Affects: fedora-all [bug 1329534]
Affects: epel-6 [bug 1329535]
Affects: epel-7 [bug 1329537]

Comment 2 Product Security DevOps Team 2019-06-08 02:50:55 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.