Bug 1459012 (CVE-2017-9438)

Summary:	CVE-2017-9438 yara: Stack consumption via a crafted rule mishandled in the _ur_re_emit function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rebus
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	yara 3.6.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 11:54:23 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:	1459013
Bug Blocks:

Description Andrej Nemec 2017-06-06 06:45:56 UTC

libyara/re.c in the regexp module in YARA 3.5.0 allows attackers to cause a denial of service (stack consumption) via a crafted rule (involving hex strings) that is mishandled in the _yr_re_emit function, a different vulnerability than CVE-2017-9304.

Upstream issue:

https://github.com/VirusTotal/yara/issues/674

Upstream patch:

https://github.com/VirusTotal/yara/commit/10e8bd3071677dd1fa76beeef4bc2fc427cea5e7

Comment 1 Andrej Nemec 2017-06-06 06:49:11 UTC

Created yara tracking bugs for this issue:

Affects: epel-6 [bug 1459013]